copa-ii.pptx

Computer Operator and Programming Assistant
Trade Theory, Semester - I
Dr.V.Nagaradjane
June 27, 2017

Syllabus
Algorithms and flowcharts. Introduction to Web Servers and
their features. Introduction to Programming and Scripting
Languages. Introduction to JavaScript and its application for
the web. JavaScript Basics Data types, Variables, Constants.
Conversion between data types. The Arithmetic, Comparison,
Logical and String Operators in JavaScript. Operator
precedence. Arrays in JavaScript concepts, types and usage.
Program Control Statements and loops in JavaScript.
Introduction to Functions in JavaScript. Built in JavaScript
functions overview. The String data type in JavaScript.
Introduction to String, Math and Date Functions. Concepts
of Pop Up boxes in JavaScript. Introduction to the Document
Object Model.

Algorithms
1) The sequence steps taken to solve a problem is called an
algorithm.
2) Algorithm helps to create computer program for problem
solving.

Flowcharts
1
1) Graphical representation of the step by step solution of a
problem is called flowchart.
2) Flowchart symbols and their purposes are given below:
(
Oval
2 Circle
Start or End of flowchart.
Connector - Indicates
flowchart continues where
a matching name or
number is found.
3
►
Arrow Indicates flow direction.
4 / / Parallelogram Input or output.
5 Rectangle Processing
6
/
/ Rhombus
Decision making (condi-
tions - if/ switch, loops -

Introduction to web servers
1 Web server sends HTML pages in response to request from
client. Web server uses Hyper Text Transfer Protocol
(HTTP).
2 Web server uses port number 80 for general data exchange
and port number 443 for data exchange over Secure Socket
Layer (SSL).
3Scripts executed by the webserver are called server side scripts.
4 PHP, Perl, Python and ASP.NET are some of the
programming languages used for server side scripting.
5 Some scripts embedded in HTML pages are executed by the
browser. The scripts executed on browser are called client side
scripts.
6 Javascript and VBScript are some of the most common client
side scripting languages.
7 Microsoft Internet Information Server (IIS), Apache httpd,
ngingx, Google Web Sever (GWS) and IBM Websphere are
some of the most common web servers.

Features of web server
1 Port numbers 80 and 443 are used by web servers.
2Web address is called Uniform Resource Locator (URL).
3 URL parts are separated by forward slash (/) symbol.
4 If a URL begins with http:// the communication takes place
on port number 80 and it is unsecure.
5 If a URL begins with https:// the communication takes place
on port number 443. Secure Socket Layer (SSL) protocol is
used to prevent data intrusion.
6 The last part of a web URL is the name of the file.
7 A folder named ‘htdocs’ or ‘wwwroot’ serves as the root
directory of the web server.

Compiler based programming languages
1 The human readable program is called source code.
2 A special program called compiler converts the source code to
machine readable binary code.
3 A source code should follow certain formatting details, called
syntax, if the program should be successfully compiled.
4 Compiler detects errors and converts/ translates the code only
if the entire program has correct syntax.
5 Since compilation is done only once, the time spent on
removing syntax and logical errors (called debugging) does
not affect the time required for running on a computer.
6After compilation, machine code runs very fast on a computer.
7 Assembly language, C, C++, Java, C#, etc. are some of the
most popular compiled languages.
8 Compiler based languages are very strict about syntax and
data types.

Interpreter based programming languages
1 Interpreter is a special program to translate few lines of source
code, load it to the processor based on program flow.
2Interpreted programs are slower than compiled programs. 3
Interpreted programming languages enforce liberal syntax
(they forgive some deviations) and have less stringent data
types.
4 Interpreted programs are easier and faster to develop for small
projects.
5 The liberal nature of interpreted programming languages
permits more errors and more complications for large
programs.
6 A class of languages suitable for embedding inside a larger
program are called scripting languages.
7 Javascript, Perl, Python, Unix/Linux shell script, etc. are
some of the most popular scripting languages.

Javascript
1 Javascript loosely follows the syntax of Java programming
language.
2 Javascript is embedded inside HTML code.
3 A Javascript function is embedded inside a pair of
< script > < /script > tags.
4 The script tag begins with one or both of the following
attributes: type=”text/javascript” and
language=”javascript”.
5 Javascript can be used as a procedural language (only
functions are permitted) or as an Object oriented language
(new data types called classes are permitted).
6 Each line of Javascript code ends with a semi-colon (;), unless
it begins a new block using curly brace({).
7 Javascript runs inside a browser.
8 Script can be written within the HTML file itself or in an
external file (with .js extension).
9 External script file (say welcome.js) may be embedded using

Comments in Javascript
1 Comments in Javascript can cover single line or multiple lines.
2 Single line comments start with // symbol and run till the end
of the line in which it is placed. For example,
x*=2; //current value of x is doubled.
//The following code calcualtes age of a person.
are examples of single line comment.
3 Multiple line comment starts with /∗and ends only when ∗
/
is found. For example,
/∗
The following lines are ignored by the browser.
x+=5;
y=Math.pow(x,2);
∗/
is an example of multi-line comment.
5 Commented portions are ignored by the browser.
6 Comments help the programmer to understand the meaning
of code at a later date.

Application of Javascript for web
1 Javascript can be embedded in HTML code.
2 Support for Javascript is available in all the modern web
browsers.
3 Javascript methods can be easily invoked through onClick
property of a button.
4 Javascript can be used to dynamically interact with the user
of a web page.
5 Since Javascript is executed inside a browser, the danger of
malware spreading to the system through the script is very
low.

Data types in Javascript
1 Javascript supports the following primitive (basic level) data
types:
Sl. No. Primitive type Description
1 String
A sequence of characters is called a String. e.g., ”
It is enclosed in double quotes.
2 Number
Any numerical value, whether integer or floating po
Number.e.g. 3, 6.23.
3 Boolean Contains the result of a logical expression. e.g., true
4 Undefined When a variable is undeclared, it is categorized as und
5 NULL It signifies the absence of any specific value.

Data types in Javascript
2 Javascript supports non-primitive data types called Object
(reference type objects).
Sl. No. Non-Primitive Description
1 Object
Represents the basic reference type. New data
ty
Javascript may be defined using function itself.
2 Array
Array represents a collection of indexed
values.
var num=new Array(”Zero”,”One”, ”Two”, ”T
alert(num[2]); displays Two in the alert dialog.
3 RegExp Regular expression used for manipulation of
strings.

Variables and constants in Javascript
1 A variable represents a memory location in which values can
be stored and retrieved.
2 Javascript variable names must start with alphabets (A-Z or
a-z) or underscore ( ) or dollar symbol ($).
3 Numbers can be used in variable names anywhere except the
first location.
4 Variable declaration starts with the keyword var. e.g., var
$x=1,y=3, z;
5 Javascript variables are case sensitive. i.e., var a=10, A=20;
declares two different variables named a and A.
6 A variable declared outside the scope of any function is called
a global variable.
7 If a declaration starts with the keyword const instead of var,
the variable so declared can be assigned a value only once.
e.g., const PI=3.14159625; will make PI a constant. New
values assigned to it (like PI=1;) will fail.

Conversion between data types
1 Data of any type (e.g. ”25.67”) can be converted to number
using the Number() function (e.g., x=Number(”25.67”);)
2 Data of any type can be converted to String using String()
function (e.g. str=String(23.23);).
3 Data of any type can be converted to Boolean type (true or
false) using Boolean() function.
4 The typeof operator helps to determine the data type of a
variable. e.g.,
var name=”Desiga”, mark=95; alert(typeof name);
alert(typeof mark);
displays String and Number as the data types respectively.
5 NaN is a special number which indicates a value too large for
storage in number type (like ∞).
6 null is another data type stored in a variable when there is no
value in a variable.
7 var x; alert(typeof x); displays that x is undefined.

Arithmetic Operators in Javascript
1 Javascript provides operators for basic operations like
Division, Multiplication, Addition, Subtraction, etc.
Table: List of arithmetic operators in Javascript
Sl.
No.
Airthmeti
Opera
- tor
c
Purpose Example Precede
n
1 ∗
∗ Exponentiation x = 10/2; // x value is 2. 1
2 ∗ Multiplication x = 10 ∗ 2; // x value is 20. 2
3 / Division x = 10/2; // x value is 2. 3
4 %
Modulo
mainder
Re- x = 10%4; // x value is 2. 4
5 + Addition x = 10 + 2; // x value is 12. 5
6 − Subtraction x = 10 − 2; // x value is 8. 6
7 ++ Increment x = 10; x + +; // x value is 11. 7
8 −− Decrement x = 10; x − −; // x value is 9. 8

Assignment Operators in Javascript
1 Javascript provides assignment operators to assign the results
of mathematical expression to variables.
Table: List of assignment operators in Javascript
e
Sl.
No.
Assignm
e
Opera
- tor
nt
Purpose Example Preceden
c
1 = Assignment x = 10; // x value is 10. 1
2 + =
Add and As-
sign
x = 10; x+ = 4; // x value is
14. 2
3 − =
Subtract and
Assign
x = 10; x− = 4; // x value is
6. 3
4 ∗ =
Multiply and
Assign
x = 10; x∗ = 4; // x value
is
40.
4
5 ∗∗ = Take power
and Assign
x = 2; x ∗∗ = 4; // x value
is
16 (∵ 24 = 2x2x2x2 = 16).
5

Comparison operators in Javascript
1 Comparison operators compare the left and right side results based
on Boolean logic (true or false) results. List of comparison operators
is shown in Table 3.
Table: Comparison operators in Javascript
Sl.
No. Operator Purpose
1 ==
Equal to (ignore data type. e.g., ”20”==20 gives
true as the result, since data types are not consid-
ered.)
2 ===
Equal to (compare data type and value. ”20” ===
20 is false.)
3 ! = Not equal to. Ignore data type.
4 ! ==
Not equal to. Gives true result only when the data
type and value are identical.
5 > Greater than.
6 >= Greater than or equal to.
7 < Less than.

Logical operators in Javascript
1 Logical operators help to combine the results of several logical
operations (AND, OR, NOT, etc.) based on Boolean logic.
Table 4 shows the logical operators used in Javascript.
Table: Logical operators in Javascript
Sl.
1 && Logical AND.
2 1
1
1
1 Logical OR.)
3 ! Logical NOT operator (Negation).

Special operators in Javascript
1 Following are some of the uncategorized, but important
operators used in Javascript (Table 5).
Table: Special operators in Javascript
Sl.
1 typeof Returns the data type of a variable.
2 new Creates a new object.
3 ? : ternary
Evaluates the logical expression to the left of ?.
Executes left side of : if it is true, right side
of : otherwise. e.g., var x = 2; y = (x ! =
2)?5 : 8; sets y value to 8, since the logical
expression is false.
4 instanceof
Checks whether a variable belongs to particular
data type.
5 in
Takes a value from an array. Used
in for loops. e.g., var x =

String operators in Javascript
1 String class supports assignment and string concatenation
operators (Table 6).
Table: String operators in Javascript
Sl.
1 =
Assigns string value on the right side to
a variable on the left side. e.g.,
var
name=”Gayathri”.
2 +
Adds 2 strings together. var x=”COPA”, y=”
is great.”; var z=x+y; sets ”COPA is great.”
as the value in z.
3 + =
Appends the string on right side to the variable
on left side. e.g., var x=”Sun”, y=” is the
nearest star.”; x+=y; sets ”Sun is the nearest

Arrays in Javascript
1 Array is a collection of values in a single variable.
2 Array elements are numbered from 0 (0,1,2,3,...).
3 Each element of an array may be accessed using []. e.g.
x = {3, 5,2,10}; alert(x[1]); displays 5.
4 In a for loop, elements of array may be accessed using index
values (0 to n) or using in operator. e.g.,
x={3,5,2,10};
for(var i=0;i¡x.length; i++)
alert(x[i]);
and
x={3,5,2,10};
for(var y in x)
alert(x[y]);
display all the elements array x.
5 Array may be declared using a pair of { } or new Array();
function.

Associative arrays in Javascript
1 Instead of accessing array elements using a numeric index, it is
possible to permit some name to each element.
2 Such an array having a name for index is called an associative
array or hash map.
3 An associative array may be declared in any one of the
following styles:
var x={’Tamil’:92,’English’:80, ’Maths’:83, ’Science’:87,
’Social Science’:81};
or
var x= new Array(’Tamil’:92,’English’:80, ’Maths’:83,
’Science’:87, ’Social Science’:81);
4 Left side of an associative array or hash is called key and the
right side is called value. e.g., in array x , ’Maths’ is key and
83 is value.
5 Elements of associative arrays are accessed using the key. e.g.,
y = x[ITamilI]; sets value of y to 92.

Control statements in Javascript
1 Control statements help in conditional execution of portions
of code.
2 Conditional controls may be imposed using
(i)if...else condition,
(ii)switch ... case ...break condition, or
(iii)ternary operator (?:).

If ... else condition
1 The if condition contains a condition part. In case the
condition is true, the block (enclosed by a pair of { })
immediately following if condition is executed.
2An if condition having a single line might omit the pair of { }.
3 In case the if condition fails, an optional elseblock may be
coded. Else may also check for a condition using an if
(else if ).
4 Else block may also omit the pair of { } if the code for it
contains a single line.

Example of if condition
<html>
<head>
<title>Test of if condition</title>
<script type=”text/javascript” language=”javascript”>
function ageMessage() {
var age = this.ageForm.age.value;
if(age < 13) {
document.write(”<h1 style=’color:#FF0000’>You are a kid </h1>”);
}
else if(age < 20) {
document.write(”<h1 style=’color:#FF0000’>You are a teenager! </h1>”);
}
else if(age < 36)
document.write(”<h1 style=’color:#FF0000’>You are young! </h1>”);
else if(age < 50)
document.write(”<h1 style=’color:#FF0000’>You are middle aged! </h1>”);
else
document.write(”<h1 style=’color:#FF0000’>You are old! </h1>”);
}
</script>
</head>
<body>
<form name=”ageForm”>
<center>
Enter your age: <input type=”number” name=”age”></br />
<input type=”button” value=”Get message” onClick=”ageMessage()”>
</center>
</form>
</body>
</html>

How the if condition program works?
1 The if ladder first tests whether the age is less than 13. In
case it is correct, the message ”You are a kid!” is displayed.
2 In case the value is the first test fails (age ¿= 13), the else if
part tests whether the age is between 13 and 19. In such a
case, the message ”You are a teenager!” loads.
3 In case the age is greater than or equal to 20, the third else if
condition checks whether the age is less than 36. If so, the
message ”You are young!” is displayed.
4 In case the age is greater than or equal to 36, the third else if
condition checks whether the age is less than 50. If so, the
message ”You are middle aged!” is displayed.
5 When all the if conditions fail, the last else is reached. It
displays the message ”You are old!”.

Switch condition
1 Switch condition takes one argument (e.g. switch(x)).
2 It checks the input against several case values (e.g., case 2:)
and executes the lines following the matching case.
3All cases, other than the last one end with break keyword.
4 The last condition may be called default :, which handles
cases not matching any of the previous ones.

<html>
<head>
<title>Test of switch condition</title>
function nameMessage() {
var name = this.nameForm.name.value;
var length=name.length;
switch(length) {
case 1:
case 2:
case 3:
case 4:
case 5:
document.write(”<h1 style=’color:#FF0000’>Very short name! </h1>”);
break;
case 6:
case 7:
case 8:
case 9:
case 10:
document.write(”<h1 style=’color:#FF0000’>Length of your name is normal! </h1>”);
break;
case 11:
document.write(”<h1 style=’color:#FF0000’>Your name is bit long! </h1>”);
break;
default:
document.write(”<h1 style=’color:#FF0000’>Your name is too long! </h1>”);
}
}
</script>
</head>
<body>
<form name=”nameForm”>
<center>
Enter your name: <input type=”text” name=”name”></br />
<input type=”button” value=”Get message” onClick=”nameMessage()”>
</center>
</form>

How the switch...case program works?
1 The switch takes length of name as argument.
2 For cases 1, 2, 3, 4 and 5, it displays the message ”Very short
name!”.
3 For cases 6, 7, 8, 9 and 10, it displays the message ”Length of
your name is normal!”.
4For case 11, it displays the message ”Your name is bit long!”.
5 As the default case (length > 11), it displays the message
”Your name is too long!”.
6 Note that cases and case groups end with break.
7 The last condition (default) need not have a break.

The ternary operator (?:)
1 A simple if ... else condition may be re-written using one liner
called ternary.
2 Ternary operator has 3 parts.
3 First part of the ternary operator (to the left of ?) is the
condition. The condition may be either true or false.
4 The second part of the ternary, placed to the right of ? and
the left of :, is executed if the condition is true.
5 The third part of the ternary, placed to the right of :, is
executed if the condition is false.
6 Consider the following lines:
x = 25;
y = (x < 21)?“GoodII : “BadII;
can you guess the value of y?
6 y has the value of “Bad”, since the condition turns out to be
false.

Example of ternary operator (?:)
<html>
<head>
<title>Test of if condition</title>
function bmiMessage() {
var wt = this.bmiForm.wt.value,
ht=this.bmiForm.ht.value/100; //Convert height from centimeter to metre.
var bmi=wt/ht/ht;
var mess=”Your BMI is ”;
mess += bmi<=20.3?”very good!”:”very high. You need exercise!”
document.getElementById(”res”).innerHTML=”<h1 color=#FF0000> ”+mess+”</h1>”;
}
</script>
</head>
<body>
<form name=”bmiForm”>
<center>
Enter weight: <input type=”number” name=”wt”></br />
Enter height in centi metre: <input type=”number” name=”ht”></br />
<input type=”button” value=”Get message” onClick=”bmiMessage()”>
<span id=”res”> </span>
</center>
</form>
</body>
</html>

Loops in Javascript
1 Javascript supports 4 types of loops:
(a) for loop with index value.
(b) for − in loop with list of array elements.
(c) while loop.
(d) do − while loop.
2 For loop having index value handle only integer index.

1 Index value of for loop may be declared before
commencement of the loop or at the loop itself. (e.g., var i;
for(i = 0;i < 10;i + +) is equivalent to
for(var i = 0;i < 10;i + +)).
2 The for loop has 3 parts, viz., (i)initialization part,
(ii)condition part, (iii)increment part.
3The initialization part sets the initial value of index variable.
4 The for loop keeps running so long as the condition part
(second of the three parts) is true.
5 The increment part increases or decreases value of variable.
e.g., for(var i = 0;i < 100;i + +),
for(var i = 0;i < 100;i+ = 2),
for (var i = 100; i >= 0; i − −), for (var i = 0; i < 100; + + i ),
for (var i = 0; i < 100; i + = 10) are all valid increments to the
index variable of for loop.
6 Each of the 3 parts of for loop is separated by a ;
(semi-colon).
7 One of more of the parts of for loop may be omitted.e.g.,
var i = 0;for( ;i < 10;i + +), for(var i = 0;i < 10; ),

Example of for loop
<html>
<head>
<title>
Example of for loop
</title>
</head>
<body>
var x = new Array(4,2,6,8,12,15,25), sum=0;
document.write(”Sum of ”);
for(var i=0; i<x.length; i++) {
document.write(x[i] + (i==x.length-1?” = ”:” + ”));
sum += x[i];
}
document.write(sum);
</script>
</body>
</html>

for − in loop in Javascript
1 for − in loop is used in conjunction with arrays and lists.
2 A typical for − in loop to move through the elements of an
array creates an index variable which changes value from the
first index to the last.
3 The for − in loop is a convenient replacement to for loop
having separate declaration, index limit checking and
increment parts.

Example of for − in loop
<html>
<head>
<title>
Example of for-in loop
</title>
</head>
<body>
var x = new Array(4,2,6,8,12,15,25), sum=0;
document.write(”Sum of ”);
for(var y in x) {
document.write(x[y] + ” ”);
sum += x[y];
}
document.write(” is ”+sum);
</script>
</body>
</html>

Mark statement using for − in loop and associative array
<html>
<head>
<title>
</title>
</head>
<body>
var x = {’Tamil’:92, ’English’:98, ’Maths’:100, ’Science’:94, ’Social’:91};
var sum=0;
document.write(”<center><h1>Mark statement</h1> <table border=1>”);
document.write(”<tr><th>Subject</th> <th>Mark</th></tr>”);
for(var y in x) {
document.write(”<tr><td>”+y+”</td><td
style=’text-align:right’>”+x[y]+”</td></tr>”);
sum += x[y];
}
document.write(”<tr><td style=’color:#FF0000;
text-align:center’>Total</td><td style=’color:#FF0000;
text-align:right’>”+sum+”</td></tr></table>”);
</script>
</body>
</html>

While loop in Javascript
1 While loop checks a condition. If the condition yields true,
the loop portion is executed.
2 If the loop contains only one statement, use of a pair of curly
braces ({ }) is optional.
3 If the loop contains more than one statement, the entire loop
body is enclosed in a pair of curly braces({ }).
4 Index variable of the while loop should be declared and
initialized before the while loop begins.
5 Index variable, if any, should be incremented or decremented
in a separate line within the while loop.

Example of while loop
<html>
<head>
<title>
</title>
<script>
function table() {
var x=this.document.tabForm.n.value, y, i=1;
document.write(”<center><h1 style=’color:#FF0000’>”+x+” Table</h1><h2>”);
while(i<=10) {
y = i*x;
document.write(i+” x ”+x+” = ”+y+”<br />”);
i++
}
document.write(”</h2></center>”);
}
</script>
</head>
<body>
<center>
<form name=”tabForm” method=”GET” action=”#”>
Enter table number: <input type=”number” name=”n”> <br />
<input type=”button” value=”Create table” onClick=”table()”>
</form>
</center>
</body>
</html>

The do ... while loop in Javascript
1 Do ... while loop is a special loop which gets executed at least
once, because the condition is checked only at the last
statement of the loop.
2The index variable, if any, should be declared outside the loop.
3 The do ... while loop checks the condition at the last line
(which is a while).

Example of do ... while loop - Fibonacci series <html>
<head>
<title>
Example of do ... while loop
</title>
</head>
<body>
<script>
var i=1, x=1,y=1;
document.write(”<h1 style=’color:#FF0000’>Fibonacci series</h1><br
/>”);
document.write(”<h1 style=’color:#0000FF’>”+i+”) ”+x+”<br />”);
var next=false;
do {
document.write((++i)+”) ”+y+”<br />”);
var z=x;
x=y;
y+=z;
next = confirm(”Do you want the next Fibonacci number”);
}while(next);
document.write(”</h2>”);
</script>
</body>
</html>

Functions in Javascript
1 Generally, functions have 3 components:
(a) The function keyword at the beginning.
(b) The name of function following the function keyword. The
name of function contains pair of brackets (), which might
contain arguments.
(c) Body of the function enclosed in a pair of curly braces ({ }).
The function might use return keyword to return a value after
processing data.
2 In general, a named block of code is called function, which
may be invoked using the given name.
3 A variable declared inside the function dies within that
function.
4 A function may access variables declared inside the function or
with a global scope (outside any function).
5 Any changes made by a function to the global variables is
permanent and is visible in other functions too.

The following code shows 3 functions, having different combination of
arguments and return values. <html>
<head>
<title>
Test of Javascript functions
</title>
<script>
//Function without argument and without return value
function add1() {
var x = prompt(”Enter x”), y = prompt(”Enter y”),
z=Number(x)+Number(y);
alert(x+” + ”+y+” = ”+z);
}
//Function with arguments but without return value
function add2(x, y, z) {
var z=Number(x)+Number(y);
alert(x+” + ”+y+” = ”+z);
}
//Function with arguments and return value
function add3(x, y) {
var z = Number(x)+Number(y);
return z;
}
</script>

Use of function for OOPS in Javascript
1 OOPS stands for Object Oriented Programming System.
2 Object is a programming entity having properties (to store
values) and methods (to work with properties).
3 Javascript supports Object creation using function.
4 A function can be converted to a class definition.
5 Variable declared inside the function is accessed with dot
operator.
6 A method is declared using the expression this.method =
function() {}.

Example of objects using Javascript function <html>
<head>
<title>
OOPS using Javascript
</title>
<script>
function Student(name, dob, grade) {
this.name=name;
this.dob=dob;
this.grade=grade;
this.getName = function() {
return this.name;
}
this.getDOB = function() {
return this.dob;
}
this.getGrade = function() {
return this.grade;
}
this.setGrade = function(gr) {
this.grade = gr;
}
}
</script>
</head>
<body>
<script>
var s1 = new Student(’Desiga’, ’2000-05-12’,’A’),
s2 = new Student(’Gayathri’,’2001-03-01’,’B’);
document.write(”<h1 style=’color:#FF0000’>Before changing grade</h1><h2 style=’color:#0000FF’>”);
document.write(s1.getName()+”: ”+s1.getDOB()+”: ”+s1.getGrade()+”<br />”);
s1.setGrade(’S’);
s2.setGrade(’A’);
document.write(”</h2><br /><br /><h1 style=’color:#FF0000’>After changing grade</h1><h2
style=’color:#0000FF’>”);

Built in JavaScript functions overview
1 Functions which are readily available in the general
environment of Javascript are called built-in functions.
2 Buil-in functions help to process data belonging to the built-in
data types.
3 Built-in functions of Javascript may be categorized under the
following heads:
(a) Number functions
(b) String functions
(c) Array functions
(d) Date functions
(e) Math functions
4 The built-in functions belonging to the above categories are
described in the following sections.

Built-in functions in Number data type
► toExponential(): Formats a number in exponential
(X × 10y ) notation.
► toFixed(digits): Formats a number with given number of
digits after the decimal point.
► toLocaleString(): Formats a number based on browser
geo-location.
► toPrecision(digits): Formats the number with given total
number of digits (including those to the left and right of
decimal point).
► toString(): Returns String value.
► valueOf(): Returns value of the number.

Built-in functions in String data type
► charAt(index): Returns character at given index location.
Counting starts from 0.
► charCodeAt(index): Returns UNICODE value of the
character at given location. Counting starts from 0.
► concat(s1,s2, s3): Joins given Strings (s1, s2, s3, etc.) with
original String and returns the joined String.
► indexOf(s1): Returns the location where the given String s1
occurs inside the original String. Returns -1 if no occurrence
of s1 is available inside the original String.
► lastIndexOf(s1): Returns the last location where the given
String s1 occurs inside the original String. Returns -1 if no
occurrence of s1 is available inside the original String.
► localeCompare(s1): Compares original String and given
String. Returns -1 if the original String sorts before given
String, 0 if both are equal and 1 if the original String sorts
after the given String.
► length(): Returns the length of String.

Built-in functions in String data type
► match(s1): Compares the original and given Strings based on
regular expression notation.
► replace(s1, s2): Search for occurrences of s1 inside the
original String and replace with s2. String s1 may have regular
expression.
► search(s1): Searches the original String for the given String
s1. The String s1 may have regular expression.
► slice(begin, end): Splits the original String between given
beginning and end points. Returns the split String.
► toLocalLowerCase()/ toLocalUpperCase(): Returns lower
case version (or upper case version) according locale String
based on current geo-locale.
► toLowerCase()/ toUpperCase(): Returns lower case version
(or upper case version) according locale String.

Built-in functions in Array data type
► concat(a1, a2, a3): Appends arrays a1, a2, a3, etc. to the
original array and return the resultign array.
► every(function): Returns values which satisfy given function.
The function should return Boolean value.
► filter(function): Returns values which satisfy given filter
function. The function should return Boolean value.
► forEach(function): Calls given function for each element of
the array.
► indexOf(val): Returns the firts occurrence location of the
given value in the original array.
► join(): Creates a String using the values of the array.
► lastIndexOf(val): Returns the last location at which given
value occurs.
► map(function): Calls given function with each element of the
array and returns the results in new array.

Built-in functions in Array data type
► pop(): Remove the last element of the array.
► push(): Add new element to the end of the array.
► reduce(): Apply given function to the right and left elements
and replace them with given result till there remains only a
single element.
► reduceRight(): Reduces given array from right to left,
applies given function and returns a single value.
► shift(): Removes the first element of the array. Returns the
value of removed element.
► slice(begin, end): Splits the array from given beginning
through the given end.
► sort(): Sorts elements of the array.
► splice(location, length, value): Adds given value at given
location. It removes elements at given location if the length is
greater than 0.
► unshift(): Adds one element to the beginning of array.

Built-in functions in Date data type
► Date(): Date and time of today and now.
► getDate(): Returns day of month (month counting starts at
0).
► getDay(): Returns day of week (day count starts at 0).
► getFullYear(): Returns year stored in the date object in 4
digit format.
► getHours(): Return the time stored in the date object in 24
hour format.
► getMilliSeconds(): Returns the millisecond value of time
stored in date object.
► getMinutes(): Returns the minutes part of time stored in the
date object.
► getMonth(): Returns month value stored in the date object
(month count starts at 0).
► getSeconds(): Returns the seconds part stored in the date
object.

► getTime(): Returns milliseconds passed since the epoch date
of 01.01.1970 (midnight).
► getUTCDate(), getUTCDay(), getUTCFullYear(),
getUTCHours(), getUTCMilliseconds(),
getUTCMinutes(), getUTCMonth(), getUTCSeconds():
get day of month, day of week, year, hours, milli-seconds,
minutes, month and seconds in Coordinated Universal Time.
► setDate(dt): Set dt value in the day of month part of date
object.
► setFullYear(y): Set y value in full year part of date object.
► toDateString(): Returns the date and time values in human
readable string format.
► toGMTString(): Returns human readable date and time in
Greenwich Mean Time format.
► toLocalFormat(): Converts date to given format string.
► toLocaleString(): Returns string value of date to the local
date and time format.

► toLocaleTimeString(): Returns time part of the date
according local format.
► toSource(): Return string equivalent of date object.
► toUTCString(): Returns string value of date object in
Coordinated Universal Time format.
► valueOf(): Returns the primitive value of date object.
► Date.parse(str): Parse the string and obtain equivalent date
object.
► Date.UTC(): Returns milliseconds value based on
Coordinated Universal Time.

Built-in functions in String Math type
► Math.abs(x): Returns absolute value of given number,
ignoring + or - signs.
► Math.acos(x): Returns arc cosine (cos−1) value of x.
► Math.asin(x): Returns arc sine (sin−1) value of x.
► Math.atan(x): Returns arc tangent (tan−1) value of x.
► Math.atan2(x, y): Returns the arc tangent (tan−1) of x
y
value.
► Math.ceil(x): Returns the integer just greater than given
fraction x.
► Math.cos(x): Returns the cosine value of x.
► Math.exp(x): Return ex value of x, where eis the base for
Napier’s logarithm (e = 2.718281828459)
► Math.floor(x): Returns the integer just lower than the given
fraction x.
► Math.log(x): Returns natural logarithm to the base efor the
value of given x.

Built-in functions in Math data type
► Math.log10(x): Returns logaithm to the base 10 for value of
x.
► Math.max(x,y,z,...): Returns maximum of the given set of
values.
► Math.min(x,y,z,...): Returns minimum of the given set of
values.
► Math.pow(x,y): Returns x power y (xy ) value.
► Math.random(): Returns random number between 0 and 1.
► Math.round(x): Rounds given number x to the nearest
integer value.
► Math.sin(x): Returns sine value of x.
► Math.sqrt(x): Returns square root of x.
► Math.tan(x): Returns tangent value of x.

Built-in functions in RegExp data type
► RegExp.match(exp): Matches given exp regular expression
against the given string. Returns the matching part.
► RegExp.test(exp): Matches given exp regular expression
against the given string. Returns true if a matching part is
found.

Popup boxes in Javascript
1 Popup box opens out of a web page to convey an information,
to confirm an action or to obtain an input.
2 Following types of popup boxes are supported by Javascript:
(i) alert(message): Displays given message through a popup
dialog.
(ii) confirm(message): Confirms whether given option should be
OK or Cancel.
(iii) prompt(message, default): Prompts for an input by
displaying a message and a default value (optional).

Example of dialogs in Javascript
<html>
<head>
<title>Dialogs in Javascript</title>
</head>
<body>
<script>
var x = prompt(”Enter x:”,”10”);
var y = prompt(”Enter y:”,”20”);
if(confirm(”Do you wish to add the numbers?”)) {
var z = Number(x)+Number(y);
alert(x+” + ”+y+” = ”+z);
else
}
alert(”You have chosen not to do anything with the given
numbers”);
</script>
</body>
</html>

Document Object Model (DOM)
1 Accessing elements of a web page as though they belong to a
document (using the this.document interface methods and
properties) is called Document Object Model (DOM).
2 Document Object Model (DOM) may be visualized as shown
in Fig.1.
Figure: Document Object Model[1]

Properties of Document Object Model (DOM)
3 DOM supports access to HTML elements. Such element
properties of DOM are shown in Fig.2.
Figure: Properties of Document Object Model[2]

Methods and properties of Document Object Model
(DOM)
(1) getElementById(id): Returns the element having the given
id from the HTML document.
(2) getElementByName(name): Returns the HTML element
having the given name.
(3) getElementsByTagName(tag): Returns an array of
elements having the given tag name.
(4) getElementsByClassName(cls): Returns an array of objects
belonging to given class name.
(5) write(str): Writes given string value to the document.
(6) writeln(str): Writes given string value to the document and
appends a newline character.
(7) innerHTML: Sets HTML portion for a particular element of
the document.
(8) innerText: Sets text value for a particular element of the
document.

Example of DOM
<html>
<head>
<title>
Test of DOM
</title>
<script type=”text/javascript”>
function welcome() {
var name = document.nameForm.n.value; //DOM access
document.write(”Welcome ”+name+”!”); //DOM method write is used
}
</script>
</head>
<body>
<form name=”nameForm” method=”GET” action=”#”>
<center>
Enter name: <input type=”text” name=”n”><br />
<input type=”button” value=”Message” onClick=”welcome()”>
</center>
</form>
</body>
</html>

Browser Object Model (BOM) in Javascript
1 Browser Object Model (BOM) is supported by the window
class.
2 The window class of BOM is the parent of all other objects.
The structure of BOM is shown in Fig.3.
Figure: Properties of Browser Object Model[2]

Methods of window object in BOM
1 alert(msg): Displays alert message.
2 prompt(msg, default): Displays input dialog with given
message and default value.
3 confirm(msg): Displays confirmation dialog with OK and
Cancel options.
4open(): Opens a new window.
5 close(): Closes current window.
6 setTimeout(): Waits for given amount of time before taking
action.

Methods of window.history object in BOM
1 window.history.forward(): Equivalent to pressing forward
button in browser.
2 window.history.back(): Equivalent to pressing back button
in browser.
3 window.history.go(number): Loads given page number in
history object.

Methods of window.history object in BOM
1 window.screen.width: Returns the width of screen.
2 window.screen.height: Returns the height of screen.
3 window.screen.availWidth: Returns available width after
deducting the width of unusable portions.
4 window.screen.availHeight: Returns available height after
deducting the height of unusable portions (like title bar, status
bar, etc.).
5window.screen.colorDepth: Returns color depth.
6 window.screen.pixelDepth: Returns pixel depth.

Introduction to VBA features and applications. VBA Data
types,Variables and Constants. Operators in VBA and
operator precedence. Mathematical Expressions in VBA.
Introduction to Strings in VBA. Introduction to Arrays in
VBA. Conditional processing in VBA, using the IF, Elseif,
Select ... Case Statements. Loops in VBA. VBA message
boxes and input boxes. Introduction to Creating functions and
Procedures in VBA. Using the built in functions. Creating and
editing macros. Introduction to Object Oriented Programming
Concepts. Concepts of Classes, Objects, Properties and
Methods. Events and Event driven programming concepts.
The user forms and control in Excel VBA. Properties,events
and methods associated with the Button, Check Box, Label,
ComboBox, Group Box, Option Button, List Box, Scroll Bar
and Spin button controls. Overview of ActiveX Data objects.
Debugging Techniques.

Features of VBA
1 VBA stands for Visual Basic for Applications.
2 VBA provides a powerful programming environment within
MS Office.
3 VBA can manipulate data in Excel spreadsheets.
4 VBA can be used to create new user intefaces using buttons,
labels, text boxes, combo boxes, radio buttons and lists.
5 VBA is capable of Object Oriented Programming System
(OOPS).
6 VBA programs cannot run as standalone programs. VBA code
requires a “Host Application” (like MS Excel, MS Word, MS
Powerpoint, etc.) to run.

Features of VBA
7 VBA provides the ability to automate repeated works carried
out using MS Excel.
8 VBA source code is compiled into Microsoft P-Code (packed
code).
9 Microsoft P-code is saved inside an MS Office file (.docx,
.xlsx, .pptx, etc.).
10 MS Office applications use a hypothetical computer processor
called Virtual Machine, to run the P-code of VBA.
11 The virual machine communicates with the processor and gets
the work executed.
12 Comment in VBA begins with a single quote (‘) and continues
till the end of that line.
13 VBA variables can be declared on the fly. If an unknown
variable in used, VBA assumes that it is newly declared.
14 On the fly declaration of variable may lead to errors, since a
mistyped value (like tset instead of test) would be taken as a
new variable.
15 If the sentence Option Explicit is included at the beginning

Applications of VBA
1 If a text string needs to be inserted repeatedly at many places
in a document, VBA script will simplify the task.
2 VBA can be used to automate repeated processes required to
create a report from available data.
3 VBA can be used to check errors or wrong entries in
spreadsheet, since it has sophisticated access system to handle
cells.
4 VBA can be used to create a small front end, which will insert
data to a spreasheet in the background. This will prevent
erroneous entry of data.
5 When same set of operations are to be performed on several
Excel sheets, VBA will help to automate the task.

Applications of VBA
6 When a single keystroke or button is needed to carry out a set
of operations, VBA can be used to create that keystroke or
button.
7 VBA can be used to create a custom command on the menu
bar.
8VBA can be used to create a custom button on any tool bar.
9 VBA can be used to create custom plugins for Excel.
10 VBA can be used to create a complete application, with the
only limitation that it will be running inside MS Excel.

Data types in VBA
1 Following are the data types supported by VBA (Table 7):
Table: Data types in VBA
5
Sl.
No. Data type
Size
(Byte) Description
1 Boolean 2 Stores true (0) or false (-1) value.
2 Byte 1 Stores integer values 0 to 255.
3 Currency 8
Stores money values
−922, 337, 203, 685, 477.5808
+922, 337, 203, 685, 477.5807.
from
to
4 Date 8
Stores date values from 01-Jan-100 to 31-Dec-
9999.
5 Decimal 14
Stores values ±79, 228, 162, 514, 264, 337, 593, 543, 950, 33
as integer or
±7.2998162514264337593543950335 as
floating point number (28 decimal places).
6 Double 8
Stores values ±1.79769313486232E308 to
±4.94065645841247E324.
7 Integer 2 Stores values −32, 768 to +2, 767.
8 Long 4
Stores values −2, 147, 483, 648
+2, 147, 483, 647.
to
9 Object 4 Stores reference to any object.
10 Single 4
Stores values ±3402823E38
±1.401298E45.
to
11 String 10+length
Stores character values from 1 character to
65,400 characters.
12 Variant
16
22+len
or Stores numbers larger than Double or character
sequences longer than String types.

Rules for variable names in VBA
1 All variable names should begin with an alphabet.
2 VBA is not case sensitive. A variable declared
DIM x as Double
can be accessed using a capital X as follows:
X=50
MsgBox X.
3 A variable in VBA can have maximum length of 255
characters.
4The first letter of variable name may be followed by numbers.
5 Special characters like ’ ’(space), . (dot), ! (exclamantion), @,
&, $ and # should not be used in variable names.
6 Variable names should not be the same as function names,
method names or predefined constant names.

VBA Shortcuts
1 Alt+F11: Opens VBA editor.
2 Alt+F8: Displays list of macros.
3Ctrl+Break: Stop execution of program.
4 Ctrl+G: Displays immediate window.
5 Ctrl+I: Display information regarding selected element.
6Ctrl+J: Displays properties and methods of selected object.
7 Ctrl+R: Displays project explorer.
8 Ctrl+Shift+I: Display parameter information for selected
element.
9 Ctrl+Shift+J: List all constants.
10 F9: Add breakpoint to examine values in variables.
11 F5: Run the program.
12 F1/ F2/ F4: Displays Help/ Object browser/ Properties
windows.

Useful function in VBA
1 Asc/ AscB/ AscW: Convert a character to numeric value in
American Standard Code for Information Interchange (ASCII),
Double Byte Character Set (DBCS) or Unicode system.
2 Chr/ ChrB/ ChrW: Convert a number to character value
value in American Standard Code for Information Interchange
(ASCII), Double Byte Character Set (DBCS) or Unicode
system.
3 CStr: Convert any data to String.
4 CVErr: Create custom error code for program.
5 Format: Converts given date or number value to specified
string format.
6InputBox: Displays a dialog and takes single input from user.
7 MsgBox: Displays a message box.
8 Val, CByte, CCur, CDbl, CDec, CInt, CLng, or CSng:
Convert given string to Number, Byte, Currency, Double,
Decimal, Integer, Long or Single values.

Operators in VBA
1 VBA Supports the following types of operators:
(i) Arithmetic operators(Table 8)
(ii) Comparison operators (Table 9)
(iii) Concatenation operators (Table 10)
(iv) Logical operators (Table 12)
(v) Bitwise operators (Table ??)

Arithmetic operators in VBA
Arithmetic operators in VBA are enlisted in Table 8.
Table: Arithmetic operators in VBA
Sl. No. Operator Purpose Precedence
1 ˆ Power (e.g. xy , 23) 1
2 % Modulo remainder (e.g. x%y,
22%3)
2
3 / Division (e.g. x/y, 22/3) 3
4 * Division (e.g. x ∗ y, 22 ∗ 3) 4
5 - Division (e.g. x − y, 22 − 3) 5
6 + Division (e.g. x + y, 22 + 3) 6

Comparison operators in VBA
Comparison operators in VBA are enlisted in Table 9.
Table: Comparison operators in VBA
Sl. No. Operator Purpose
1 =
Compares for equality (e.g. if x =
y, if 2 = 3)
2 <>
Not equal to (e.g. if x <>
y, if 22 <> 3)
3 >
Greater than (e.g. if x > y, if 22
>
3)
4 < Less than (e.g. if x < y, if 22 < 3)
5 >=
Less than or equal to (e.g. if x >=
y, if 22 >= 3)
6 <=
Less than or equal to (e.g. if x <=
y, if 22 <= 3)

Concatenation operators in VBA
Concatenation operators in VBA are enlisted in Table 10.
Table: Concatenation operators in VBA
1 +
Concatenates strings, but adds num-
bers. (e.g. a = ”Welcome” +
”toVBA!”; b = ”5” + ”10” store
”Welcome to VBA!” in a and 15 in
b.)
2 &
Concatenates strings and
numbers. (e.g. a =
”Welcome” & ”toVBA!”; b =
”5” & ”10” store ”Welcome to
VBA!” in a and 510 in b.)

Logical operators in VBA
Logical operators in VBA are enlisted in Table 12.
Table: Logical operators in VBA
1 AND
Returns true if both conditions are
true (e.g. If 5 < 10 AND 6 >
10Then results in false.)
2 OR
Returns true if at least one condition
is true (e.g. If 5 < 10 OR 6 >
10Then results in true.)
3 NOT
Negates the result (toggles true or
false) (e.g. If NOT 5 < 10Then re-
sults in false.)
4 XOR
Returns true if and only if only one
of
the 2 conditions is true (e.g. If 5 <
10 XOR 6 > 10Then results in true
but If 5 < 10 XOR 6 < 10Then re-
sults in false.)

Bitwise operators in VBA
Bitwise operators in VBA are enlisted in Table ??.
Table: Bitwise operators in VBA
1 AND
Returns 1 if both bits are 1 (e.g. a = 5 AND 3
(00000101 AND 00000011 = 00000001) results in
1.)
2 OR
Returns 1 if any one of the bits is 1 (e.g. a = 5 OR
3
(00000101 OR 00000011 = 00000111) results in
7.)
3 NOT
Returns 1 if the input is 0. Returns 0 if the input is
1.
(e.g. a = NOT 5 (NOT 00000101 = 11111010)
results in 250 in byte range.)
4 XOR
Returns 1 if only one of the given
bits is 1. (e.g. a = 5 AND 3
(00000101 XOR 00000011 = 00000110) re-
sults in 6.)

Mathematical Functions in VBA
(1) ABS: Returns positive (absolute) value irrespective of
whether the input value is positive or negative. e.g. ABS(−7)
returns 7).
(2) ATN: Arc tangent or tan−1
(3) COS: Cosine value.
(4) EXP: Exponential value of given number (ex).
(5) FIX: Return integer portion of given number (a = FIX(5.95)
results in a value of 5).
(6) FORMAT: Return the given number formatted as the
instructions provided through a string
(FORMAT(15.95345,”##, 000.00”) returns 015.95). The
value of 0 denotes a compulsory digit and # denotes an
optional digit.
(7) INT: Return integer portion of given number (a = FIX(5.95)
results in a value of 5).

Mathematical Functions in VBA
(8) LOG: Returns logarithm of given number to specified base
(x = log (2, 10)) calculates logarthm of 2 to the base 10 and
stores the result in x.
(9) RANDOMIZE: Initializes random number generator to a new
initial value.
(10)RND: Returns a random integer value between specified input
values.
(11)ROUND: Returns given number after rounding it to specified
digits.
(12) SGN: Returns the sign (±) of given number.
(13) SIN: Returns the sine value of given angle.
(14) SQR: Returns the square root of given number.
(15)TAN: Returns the tangent value of given angle.

String functions in VBA
(1) ASC: Returns ASCII (American Standard Code for
Information Interchange) number value for given character.
(2) CHR: Returns character value of given number based on
ASCII (American Standard Code for Information Interchange)
system.
(3) &: Concatenate 2 strings.
(4) FORMAT: Format given string based on the instruction given
in the second string. Typical instructions include ”Standard”,
”Percent”, ”Currency”, ”Short date”, etc.
(5) INSTR: Returns the location value at which the second string
occurs in the first string.
(6) INSTRREV: Returns the location value at which the second
string occurs in the first string when searching from the end
(reverse direction) of string.
(7) LCASE: Returns Lower Case version of the string.
(8) LEFT: Returns given number of characters from the left end
of string.

(9) RIGHT: Returns given number of characters from the right
end of string.
(10)LEN: Returns the length of string.
(11) LTRIM: Returns a string after removing all white spaces to
the left of the string (leading white spaces).
(12)RTRIM: Returns a string after removing all white spaces to
the right of the string (trailing white spaces).
(13) MID: Extract a substring from given start position through
given number of characters.
(14)REPLACE: Replace given search string (string 2) using the
replacement string (string 3) in the original string (string 1).
(14) SPACE: Returns a string containing specified number of
spaces.

(15)STR: Converts a number to String.
(16)STRCOMP: Compare 2 strings and return 0 for equal, -1 for
less than and 2 for greater than results.
(17)STRCONV: Converts given string to upper case, lower case,
proper case or unicode as the per the second argument.
(18)STRREVERSE: Reverses given string.
(19)STRREVERSE: Reverses given string.
(20)TRIM: Remove leading and trailing spaces.
(21)UCASE: Converts given string to upper case.
(22)VAL: Returns numeric value parsed from given string.

Date/ time functions in VBA
(1) DATE: Returns system date.
(2) DATEADD: Adds given duration of time (yyyy - year, q -
quarter, m - month, y - day of the year, d - day, w - weekday,
ww - week, h - hour, n - minute, s - second).
(3) DATEDIFF: Calculate the difference between date1 and
date2 in the unit provided as the first argument (yyyy - year,
q - quarter, m - month, y - day of the year, d - day, w -
weekday, ww - week, h - hour, n - minute, s - second).
(4) DATEPART: Return specified part (yyyy - year, m - month,
d - day of month) of date object.
(5) DATESERIAL: Convert given year, month and date values to
a date object.
(6) DATEVALUE: Parses a string containing date value and
returns date object.
(7) DAY: Returns day of month for given date object.
(8) FORMAT(DT, ”FMT”): Returns given date formatted as
per the instructions provided through the second argument.

Date/ time functions in VBA
(9) HOUR: Returns hour part from given time object.
(10)MINUTE: Returns minute value of given time object.
(11)MONTH: Returns month part of given date object.
(12)MONTHNAME: Returns string value of month represented
by date object.
(13)NOW: Returns current date and time.
(14)TIMESERIAL: Returns time object, given the hour, minute
and second values.
(15)TIMEVALUE: Parses time from given string.
(16)WEEKDAY: Returns the number representing the day of
week.
(17)WEEKDAY: Returns day of week for given date value.
(18)WEEKDAYNAME: Returns the name of week day.
(19)YEAR: Returns year part of given date object.

Arrays in VBA
1 Arrays in VBA are indexed from 0 to given number. Hence an
array declared Dim x(4) asVariant contains 5 elements
numbered from 0 to 4.
2 Arrays can be declared without specifying size. Dim a() is a
valid declaration. But, use redim to change its size before
using, as in ReDim PRESERVE a(10). The preserve
keyword saves any data stored in the previous array. If
preserve keyword is omitted (as in ReDim a(10)), the new
array will not have previous data.
3 An array can be declared with initialization data as follows:
Dim a
a = Array(”Coffee”,”Tea”,”Juice”).
4 Two dimensional arrays can be declared as follows:
Dim a(5,5) declares a 2 dimensional array having 6 rows and
6 columns indexed from 0 to 5.

Arrays in VBA
5 Array elements can be populated using the index values as
shown below:
Dim a(3), b(4,4)
a(0)=”Apple”
a(1)=”Grape”
b(0,0)=5
b(0,1)=4
b(1,2)=7
6 Values stored in an array can be accessed using the index
values, as shown below:
Dim a(4) as Variant
a(0)=5
a(1)=3
a(2)=4*a(0)
msgbox(”Result is ” & 5*a(1))

Methods of Array in VBA
1 LBOUND: Returns the smallest index or lower bound of
given array.
2 UBOUND: Returns the highest index or upper bound of
given array.
3 SPLIT: Split given string using a delimiter string and return
the array. An example of split:
Dim a as Variant
a = Split(”Apple#Orange#Grape”,”#”)
MsgBox a(1)
displays Orange in the message box.
4 JOIN: Join members of an array, using the second parameter
as delimiter and return a single string. An example of join:
Dim a, b as Variant
a = Array(”Apple”,”Orange”,”Grape”,”Strawberry”)
b = JOIN(a,”#”)
MsgBox b
displays ”Apple#Orange#Grape#Strawberry” in the message

Methods of Array in VBA
5 FILTER: Returns an elements of an array that fulfill given
search criterion. Example of filter:
Dim a, basVariant
a=Array(”Apple”,”Orange”,”Grape”)
b = FILTER(a,”ra”)
MsgBox JOIN(b,”, ”)
displays Orange, Grape in the message box, since these two
elements contain the letters ra in their text.
6 ISARRAY: Returns true if the given variable is an array.
Otherwise, it returns false.
7 ERASE: Sets all members of a static array to 0 or ””. Frees
memory used by dynamic array (created using REDIM).

Conditions in VBA
Following are the conditions available in VBA for decision making:
1. If ... End If statement
2. If ... Else ... End If statement
3. If ... ElseIf ... End If statement
4. Select ... Case ... End Select statement
A detailed description of each decision making statement is
presented in the following subsections.

If ... End If condition
1 If condition takes a comparison and executes the following
lines if the condition is true. It may optionally have an Else
part which is executed in case the condition is false.
2 The following shows use of if condition:
Dim x as Integer
x= InputBox(“Enter your age”,“Age please”)
If x < 12 Then
MsgBox “You get anIcecream!”
End If

If ... Else ... End If condition
1 The lines following If are executed in case the condition is
true. The lines following Else part are executed in case the
condition is false.
2 The following shows use of if ... else condition:
Dim x as Integer
x= CInt(InputBox(“Enter your age”,“Age please”))
If x < 12 Then
Else
MsgBox “You get a chocolate!”
End If

If ... ElseIf ... End If condition
1 The lines following If are executed in case the condition is
true. The ElseIf condition is checked when the first condition
fails. The ladder moves down till an End If is reached.
2 The following shows use of if ... else condition:
Dim x as Integer
x= CInt(InputBox(“Enter your age”,“Age please”))
If x < 20 Then
ElseIf x < 20
MsgBox “You get a Chocolate!”
ElseIf x < 30
MsgBox “You get a Juice!”
Else
MsgBox “Sorry! You get nothing!!”
End If

Select Case ... End Select condition
1 Select Case statement takes a single variable and compares its
value against several case conditions. When no case matches
the given select, Case Else (if provided) is executed.
2 Select Case statement ends with End Select.
3 Following is an example of Select Case condition:
Dim c, x, y, z as Integer
x = CInt(InputBox(“Enter x:”,“Enter number”))
y = CInt(InputBox(“Enter y:”,“Enter number”))
c = CInt(InputBox(“Make a choice” & Chr(10) & “1 - Add” & Chr(10) & “2 - Subtract” & Chr(10) &
“3 - Multiply” & Chr(10) & “4 - Divide” ,“Enter choice”))
Select Case c
Case 1
z = x+y
MsgBox z
Case 2
z = x - y
MsgBox z
Case 3
z = x * y
MsgBox z
Case 4
z = x / y
MsgBox z
Case Else
MsgBox(“Invalid choice”)
End Select

Loops in VBA
Following are the types of loop supported by VBA:
1. For loop
2. For ... each loop
3. While ... Wend loop
4. Do While ... Loop
5. Do Until ... Loop
The following sections describe the use of loops listed above.

For loop
1 For loop has start value, end value and a step increment. The
for loop ends with Next statement.
2 The following code depicts the use of For loop to calculate
the sum of first n integers:
Dim i, n, sumasInteger
sum=0
n=CInt(InputBox(“Enter n:”,“Enter limit for
summation”))
For i = 1 To n Step 1
sum = sum+i
Next
MsgBox(“1+2+... +” & n & “ = ” & sum)

For Each loop
1 For Each loop is applicable for Arrays. Each element of an
array is iterated using the loop and is assigned in a variable.
The For End loop ends with Next statement.
2 The following code depicts the use of For End loop to
calculate the sum of number elements in an array:
Dim x, sum as Variant
sum = 0
x = Array(2,6,3,5,1,6)
For Each yin x
sum = sum + y
Next
MsgBox(“Sum = ” & sum)

While ... Wend loop
1 While loop takes a condition and executes till that condition is
satisfied. While loop ends with Wend.
2 The following code depicts the use of While ... Wend loop to
calculate the factorial of given number:
Dim i, n, fact as Integer
fact = 1
i = 1
n = CInt(InputBox(“Enter n:”,“Factorial input”))
While i<=n
fact = fact * i
i = i + 1
Wend
MsgBox(n & “! = ” & fact)

Do While ... Loop
1 Do While loop takes a condition and executes till that
condition is satisfied. Do While loop ends with Loop
statement.
2 The following code depicts the use of Do While ... Loop to
display Fibonacci series:
Dim a, b, c, n, i as Integer
a = b = i = 1
n = CInt(InputBox(“Enter number of terms to display in
Fibonacci series:”,“Number of terms”))
Do While i<=n
If i <= 2 Then
c=1
Else
c = a+b
a=b
b=c
End If

Do Until ... Loop
1 Do Until loop takes a condition and executes till that
condition is false. Once the condition becomes true, the loop
exits. Do Until loop ends with Loop statement.
2 The following code depicts the use of Do Until ... Loop to
display Fibonacci series:
Dim a, b, c, n, i as Integer
a = b = i = 1
n = CInt(InputBox(“Enter number of terms to display in Fibonacci series:”,“Number of terms”))
Do Until i>n
If i <= 2 Then
c=1
Else
c = a+b
a=b
b=c
End If
MsgBox(“Term ” & i & “ of Fibo = ” & c)
i = i + 1
Loop

Message Box in VBA
1 Message Box is displayed using MsgBox function in VBA.
MsgBox function takes one String value as a mandatory
parameter.
2 The second parameter of message box is a list of numbers or
predefined numerical constants to customize the message box.

3 The integer parameters to control VBA dialog are given as
follows:
1. 0 or vbOKOnly - Displays OK button only.
2. 1 or vbOKCancel - Displays OK and Cancel buttons.
3. 2orvbAbortRetryIgnore - Displays Abort, Retry, and Ignore
buttons.
4. 3 or vbYesNoCancel - Displays Yes, No, and Cancel buttons.
5. 4 or vbYesNo - Displays Yes and No buttons.
6. 5 or vbRetryCancel - Displays Retry and Cancel buttons.
7. 16 or vbCritical - Displays Critical Message icon.
8. 32 or vbQuestion - Displays Warning Query icon.
9. 48 or vbExclamation - Displays Warning Message icon.
10. 64 or vbInformation - Displays Information Message icon.
11. 0 or vbDefaultButton1 - First button is default.
12. 256 or vbDefaultButton2 - Second button is default.
13. 512 or vbDefaultButton3 - Third button is default.
14. 768 or vbDefaultButton4 - Fourth button is default.
15. 0 or vbApplicationModal - The current application will not
work until the user responds to the message box.
16. 4096 or vbSystemModal - The application will keep working,
irrespective of whether the user responds to the dialog or not.

3 The integer parameters to returned by VBA dialog based on
the response of the user are enlisted as follows:
1. 1 or vbOK - OK was clicked.
2. 2 or vbCancel - Cancel was clicked.
3. 3 or vbAbort - Abort was clicked.
4. 4 or vbRetry - Retry was clicked.
5. 5 or vbIgnore - Ignore was clicked.
6. 6 or vbYes - Yes was clicked.
7. 7 or vbNo - No was clicked.

Input Box in VBA
1 Input Box can be displayed using InputBox function in VBA.
This function takes one mandatory parameter, which is
displayed as the prompt message for input.
2 The second parameter for InputBox is the title tile of the
dialog.
3 The third parameter is displayed as the default/ suggested
input value in the input dialog.
4 The fourth parameter takes x-axis value and the fifth
parameter takes y-axis value for displaying the input dialog.
5 The sixth parameter takes the name of help file and the
seventh parameter takes help context. It is provided only if
the sixth parameter is a help file.

Creating function in VBA
1 Function can be created by double clicking on any component
and entering the coding window. Delete the default
subroutine in which the cursor lands.
2 Function should begin with the keyword function and is
followed by name of the function.
3 Name of the function is followed by opening and closing
parentheses.
4 The parameters to be passed to the function are enlisted
inside the parentheses.
5 The result or return value of the function should be assigned
to a variable having the same name as the function.
6 The function can be invoked from the spreadsheet as if it were
a predefined Excel function.
7 Function ends with End Function keyword.

Example of user defined function in VBA
► The following function takes single input parameter and prints
it 10 times using a for loop:
Function rep(x as String)
Dim r, i as Variant
r = ””
For i = 1 To 10 Step 1
r = r & x
Next
rep = r
End Function

Creating and editing procedures/ subroutines in VBA
1 Subroutine begins with the keyword sub and is followed by the
name of the subroutine.
2 Subroutine ends with the keyword End Sub.
3 Subroutine does not return any value. It may store result in
global arrays.
4 Subroutines are used to handle events related to user interface
components.

Example of subroutine or procedure in VBA
► The following subroutine is invoked by clicking
CommandButton1 placed on the userform:
Sub CommandButton1 Clicked()
Dim l, b, a as Double
l = CDbl(InputBox(”Enter length”))
b = CDbl(InputBox(”Enter width”))
a = l * b
MsgBox(”Area = ” & a)
End Sub

Creating and editing macros in VBA
1 Macro can be recorded from Macro icon found in View menu.
2 It opens a dialog to record new macro.
3 A button or keyboard shortcut may be assigned to record the
macro.
4 Excel automatically records the commands equivalent to the
actions performed.
5 Macro may be edited by choosing the macro name and
pressing the Edit button in the macro dialog.

Concept of Object Oriented Programming
1 VBA supports creation of classes (using Type keyword),
properties, functions and subroutines. VBA does not support
inheritance.
2 New class can be created using Insert− >Class Module.
Suitably name the class module.
3 The class module may contain variables for storing data
related to the class.
4 Property may be declared with access level (Public or Private)
and access type defined by GET, LET/SET.
5 Subroutines and functions created inside the class module are
called methods.
6 VBA creates 2 automatic subroutines named Private Sub
Class Initialize() and Private Sub Class Terminate(), which
are invoked at the time of loading the objects of class and
clearing the object from memory respectively.
7 Properties and methods of a class may be accessed using dot
(.) operator.

Creating class in VBA
1 Open MS Excel. Press Alt+F11 to open VBA IDE.
2 Choose Insert− >Class Module (Alt+I+C). A class module
called Class1 is displayed. Change its name to Student.
3 Type the following content in the class module to create a
Student class having properties Name, DOB, Mark and Total.
The class has methods named age and percentage. The class
defines variables named n, d, m, t to hold values of name,
date of birth, mark and total mark respectively.

Private n as String
Private d as Date
Private m, t as Double
Public Property Let Name(x as String)
n = x
End Property
Public Property Get Name() as String
name = n
End Property
Public Property Let DOB(x as Date)
d = x
End Property
Public Property Get DOB() as Date
DOB = d
End Property
Public Property Let Mark(x as Double)
m = x
End Property
Public Property Get Mark() as Double
Mark = m
End Property
Public Property Let Total(x as Double)
t = x
End Property
Public Property Get Total() as Double
Total = t
End Property
Public Function age() as String
age = DateDiff(”YYYY”,d, Date)
End Function
Public Function Percentage() as Double
Percentage = m / t * 100
End Function
Public Sub howAreYou()
MsgBox (“Fine!”)

4 Insert userform by choosing Insert− >User Form (Alt+I+U).
5 Insert 4 labels and modify their captions to “Name, DOB,
Mark and Total” respectively.
6 Insert 4 TextBoxes (named TextBox1 to TextBox4) to get 4
input values.
7 Insert a command button (CommandButton1). Change its
caption to Test OOPS.

8 Enter the following code to handle clicking of
CommandButton1:
Private Sub CommandButton1 Click()
Dim x as New Student
x.Name = TextBox1.Text
x.DOB = CDate(TextBox2.Text)
x.Mark = CDbl(TextBox3.Text)
x.Total = CDbl(TextBox4.Text)
MsgBox (x.Name & Chr(10) & x.DOB & Chr(10) & x.Mark &
x.Total)
MsgBox (“Age = ” & x.age & “ years” & Chr(10) & “Percentage
= ” & x.percentage & “%”)
x.howAreYou
End Sub
9 Run the program by pressing F5 and check whether the
program works correctly.

Concept of event driven programming
1 In the normal programming, prompts are displayed to collect
input and mange user interaction.
2 Event driven programming displays a passive user interface,
which starts working when the user performs certain actions,
like clicking a button, typing, moving the mouse, etc.
3 Event driven programming is the king pin for Graphical User
Interface (GUI), since components fire events.
4 Events fired by components may be handled by designated
subroutines or functions.
5 In VBA, the most common prompt component is a label,
input component is a TextBox and action component is a
CommandButton.

Concept of event driven programming
6 In the coding window, VBA permits selection of component
(top left of the coding window) and an associated event (top
right of the coding window) which may be handled by a
subroutine.
7 Event driven programming has made it possible to use menu,
combobox, list, radiobutton, checkbox, button and other
components based on user interaction.
8 Components awaiting user interaction are similar to servants
awaiting command from the employer. Once an interaction
occurs, a particular job is carried out using event handlers.

Forms and controls in VBA
1 UserForm: UserForm is the control used for display of a
window.
2 Label: Label displays text. Caption property is used to set or
get text.
3 TextBox: TextBox takes text input. The Text property is
used to set or get the value.
4 ComboBox: Displays a ComboBox control which displays
several options to select from. It is initialized using
UserForm Activate() method using AddItem property of the
combobox control.
5 ListBox: ListBox displays a scrollable list of items. The
elements of ListBox may be added by handling
UserForm Active() method and selecting AddItem property.

6 CheckBox: CheckBox provides a tickable control. Display
value of CheckBox can be controlled using Caption property.
Tick status can be set or unset using Value property. When
Value property is true, tick mark appears. When Value
property is false, tick mark disappears.
7 CheckBox: CheckBox provides a tickable control. Display
value of CheckBox can be controlled using Caption property.
Tick status can be set or unset using Value property. When
Value property is true, tick mark appears. When Value
property is false, tick mark disappears.
8 OptionBox: OptionBox provides the facility to select one
option from several options. Normally, group of OptionBoxes
are placed on a Frame control to enable group behaviour.
OptionBoxes placed on same parent control (like Frame,
UserForm, etc.) behave as a group (only one gets selected
from a group). Value property of OptionBox determines
whether an OptionBox is selected or not.

9 ToggleButton: ToggleButton keeps in pressed condition
(Value=true) when clicked once. The button gets released
when clicked again (Value=false). The pressed or released
condition is controlled based on True or False stored in Value
property.
10 TabStrip: TabStrip displays Tab1, Tab2, etc. and permits
selection of different set of components for each tab.
Component behaviour can be controlled using
TabStrip1 Change() subroutine.
10 TabStrip: TabStrip displays Tab1, Tab2, etc. and permits
selection of different set of components for each tab.
TabStrip1 Change() subroutine.
11 MultiPage: MultiPage displays Page1, Page2, etc. and
permits selection of different set of components for each page.
MultiPage1 Change() subroutine.

12 MultiPage: MultiPage displays Page1, Page2, etc. and
permits selection of different set of components for each page.
MultiPage1 Change() subroutine.
13 SpinBox: SpinBox can be inserted in a form near any numeric
input control (like TextBox). On SpinBox1 Change() method
can be used to get the value from the SpinBox and set the
same on TextBox or other control.
14 Image:Image control displays any image provided through
Picture property.
15 RefEdit: RefEdit helps to select a range of cells from
spreadsheet during the execution of the program. Selected
range is stored in Value property of the RefEdit object.

Properties, events and methods associated with VBA
controls
1 Properties are the values which can control the behaviour of
an object.
2 The most commonly used properties are Caption, Text, Value,
Font, etc.
3 Properties window can be made visible or invisible by choosing
View− >Properties Window or by pressing Alt+V+W or by
pressing F4.
4 All the properties enlisted in the properties window can be
accessed by placing a dot (.) after the name of the object.

Events associated with VBA controls
1 Events get activated when particular action occurs due to user interaction.
2 Events associated with a particular control can be chosen from the right
side ComboBox of coding window.
3 Following are the most common events:
(i) Activate
(ii) BeforeDragOver
(iii) BeforeDropOrPaste
(iv) Click
(v) DblClick
(vi) Deactivate
(vii) Error
(viii) Initialize
(ix) KeyDown
(x) KeyPress
(xi) KeyUp
(xii) MouseDown
(xiii) MouseMove
(xiv) MouseUp
(xv) QueryClose - Only for UserForm

Methods associated with VBA controls
1 Subroutines handle events triggered by the controls.
2 The methods or subroutines have two parts, separated by an
underscore ( ).

Using ActiveX data objects in VBA
1 VBA allows database interaction using ADO objects.
2 Several types of databases are supported. The connection
string applicable for particular database type is to be chosen.
3 VBA support for particular type of database needs to be
enabled from Tools− >References. Select Microsoft ADODC
Connection Object having appropriate version number.
4 An ADODC object needs to be initialized as follows:
Dim conn as New ADODB.Connection
5 A recordset object needs to be initialized as follows:
Dim rs as New ADODB.Recordset

Using ActiveX data objects in VBA
6 A recordset object needs to be initialized as follows:
Dim rs as New ADODB.Recordset
7 Open method of ADODB.Connection object is to be invoked
by providing a connection string suitable for the selected
database engine and the data source.
8 Select query may be executed by replacing table name with
sheet name as follows:
select * from [Sheet1$];
9 Range object of Excel allows Copying of result set values in
selected range of cells.

Debugging techniques
1 The IDE provided with VBA points out simple mistakes committed
during coding (like unclosed brackets, forgotten double quotes, etc.)
2 Certain errors occur during the runtime. When error window
appears, click Debug instead of End to start debugging.
3 Runtime errors are identified by selecting the line containing the
error.
4 Just hover the mouse over the variables in the error line. The
present value of the variable would be displayed. If the value is not
the value expected to be stored in the variable, trace the line in
which assignment to that variable takes place.
5 Leaving an object without a proper initial value may cause error.
Please ensure that the objects in the error line have already been
initialized.
6 Open Immediate Window (View− >Immediate Window or press
Ctrl+G). Enter any test code in the immediate window and check
the results.
6 Create a breakpoint by Clicking on the margin to the right of the

Debugging techniques
7 The code stops executing at breakpoint. The values store in
variables may be checked from the coding window.
8 To move execution to a particular line, choose Debug− >Step
Into or press F8.
9 To move execution past the current line, choose
Debug− >Step Over or Press Shift+F8.
10 You can execute the code one line at a time by repeatedly
choosing Debug− >Step Over or Pressing Shift+F8.
11 You can halt the line by line execution of break point using
Debg− >Step Out (Ctrl+Shift+F8).
12 You can choose to continue execution using Run− >Continue
from the menu.
13 You could break execution of program by choosing
Run− >Break from the menu or by pressing Ctrl+Break.
14 The entire execution can be reset by pressing Run− >Reset.

Smart accounting
Basics of Accounting, Golden Rules of Accounting, Voucher
Entry, Ledger Posting, Final Accounts Preparation. Cash
Book. Ratio Analysis, Depreciation, Stock Management,
Analysis of VAT, Cash Flow, Fund Flow Accounting.
Introduction to Tally, features and Advantages, Implementing
accounts in Tally, Double entry system of bookkeeping,
Budgeting Systems, Scenario management and Variance
Analysis, Costing Systems, Concepts of Ratios, Analysis of
financial statements, Inventory Basics, POS Invoicing, TDS,
TCS, FBT, VAT & Service Tax Processing in Tally. Tally
Interface in Different Languages.

Basics of Accounting
1 Accounting the recording, verification and tallying of
monetary transations.
2 Accounting transaction may relate to assets, liabilities,
income, expenditure, inventory, etc.
3 Accounting transaction are chronological in nature, which
means each transaction contains a date.
4 Accounts are recorded in 8 column format.
5 First 4 columns of the account sheet are meant for Debit
(Dr.).
6 Columns 5 to 8 of the account sheet are meant for Credit
(Cr.).

Basics of Accounting
7 Column 1 is meant for date on the debit side. Column 5 is
meant for date on the credit side.
8 Column 2 is meant for particulars on debit side. Column 6 is
meant for particulars on the credit side.
9 Column 3 is meant for Journal Folio on debit side. Column 7
is meant for Journal Folio on the credit side.
10 Column 4 is meant for amount on debit side. Column 8 is
meant for amount on the credit side.
11 This method of recoding accounts in 8 columns of debit and
credit is called T-Accounting.
12 Accounting has 3 major components:
(i) Recording
(ii) Classifying
(iii) Summarising

1 American method: American method is based on the
following accounts:
(i) Assets account: Considers all items which can be disposed
and converted to money.
(ii) Liabilities account: Considers all items for which money
should be earmarked.
(iii) Revenue account: Considers all transactions which will
increase the monetary strength.
(iv) Expense account: Considers all transactions which result in
reduction of monetary strength.
2 British method: British method is based on the following
accounts:
(i) Personal accounts: Accounts which are attributed to specific
individual or business source. All balances are classified under
personal accounts.
(ii) Real accounts: Accounts related to inventories, assets and
liabilities.
(iii) Nominal account: The account which considers inflow and
outflow of money (income, expense, gain, loss, etc.) is called
nominal account. Increase in the inflow of money through
nominal account makes the business strong.

Accounting concepts
1 Business entity concept: The owner and the business are
treated as separate entities.
2 Money measurementconcept: Accounting considers only
those transactions which can be measured in terms of money.
In other words, non-monetary transactions are not recorded.
3 Going concernconcept: Accounting assumes that the
businesss as a long lasting process, irrespective of the status
of its owner, assets or employees.
4 Dual aspect concept: Each credit has a corresponding debit.
Credit is recorded in one place and the debit in some other
place. But, the sum of debits and the sum of credit should
always match.
5 Cost concept: Each transaction is recorded as per the cost
incurred by the business not based on the market value. In
simple terms, accounting records only the actual cost.

Accounting concepts
6 Accounting periodconcept: Although a business is an
indefinite process in time (going concern concept), accounts
are closed periodically (at the end of a financial year) to
determine the profit, loss, balance position, etc. of the
business.
7 Matching cost concept: For any accounting period, the the
revenue generated and the cost incurred are matched against
each other to determine the net profit or loss for that period.
8 Accrual concept: Revenue is recorded on the date of its
generation (not the date of actual realization) and expenditure
is recorded as the date of incurring the expense (not the date
on which money flows out - like the date of drawal of cheque).
9 Objective evidence concept: Each transaction entry should
be accompanied by corresponding bill, invoice, voucher,
receipt, challan, etc. to substantiate the statement and to
permit independent verification of the validity of the
transaction.

Golden rules of double entry system
1 Each credit should have a corresponding debit and each debit
should have a corresponding credit. It means each transaction
is recorded in the form a debit and a credit - resulting in
double entry system. The double entry system results in the
following sub rules:
(i) In personal accounts: Debit the receiver and credit the giver.
(ii) Inreal accounts: Debit the incoming asset and credit the
outgoing asset.
(iii) Innominal account: Debit all expenses and credit all
incomes.
2 In general, a transaction is a debit if it decreases money
owned by a business and credit if it increases money owned by
a business.

Accounting terminologies
1 Account: The record of all transactions involving money to
ascertain the current status of business is called account.
2 Accounting: The process of recording financial transactions
is called accounting.
3 Accrual basis: Recording the cost when incurred rather than
paid and recording revenue when earned rather than collected
is called called accual basis (counting the hens before the eggs
are hatched). In other words, the date of incurring an expense
through cheque may be different from the date on which the
amount is drawn by the party and the date of selling a
product on gain is different from the date on which the actual
revenue reaches the business.
4 Asset: Any item owned by the business which can be
converted to money is called asset.
5 Credit: Credit is the increase in money due to profit, sale of
asset or pay-out for a liability. It is posted on the right side of
accounting form.

Accounting terminologies
6 Debit: Debit is the reduction in money due to loss, purchase
of asset or incurring a liability.
7 Double entry accounting: Balancing debit at some ledger
through a credit at some other ledger is called double entry
accounting. Total credit and total debit balance each other.
8 Expense: The outflow of money for getting inflow of goods
or services (like rent, electricity bill, telephone bill, salary, etc.)
is called expense.
9 Income or revenue: The inflow of money due to outflow of
products or services is called income.

Voucher entry
1 Voucher is a form for entering a financial transaction.
2 Voucher has 2 sides, one for debit and another for credit.
3 A voucher may result in change of assets (inventory voucher)
or may result only in change of monetary position (accounting
voucher).
4 Voucher is prepared against invoices or other requests for
payment. Receipt voucher is prepared against payment
received from third party.
5 Vouchers are entered in journal, before posting them to
appropriate ledger.
6 The ledger name in which a credit or debit takes place is
entered in the journal itself.

Ledger Posting
1 Entering journal entries in ledger of appropriate head of
account is called ledger posting.
2 Credit side transaction entries are taken to credit side of the
ledger and debit side transaction entries to the debit side of
ledger.
3 The ledgers are divided into appropriate heads of account.

Final Accounts Preparation
1 Final accounts are prepared at the end of financial year.
2 Trading account, profit and loss account and balance sheet
are some of the final account formats.
3 Final accounts help to ascertain the financial status of
business.

Cash Book
1 Cash book records debits and credits of cash.
2 All cash inflows like bank withdrawal, receipt of sales proceeds
in cash, etc. are entered in the debit side of cash book.
3 All cash outflows like salary, rent, phone bill, etc. made using
cash are recorded on the credit side of cash book.

Ratio Analysis
1 Ratio is a measure of how good a condition has been achieved.
2 Following are the common ratios adopted in financial
management:
(i) Current ratio = current assets
current liabilities
(ii) Quick ratio = liquid assets
current liabilities
(iii) Absolute liquid ratio = absolute liquid assets
current liabilities
(iv) Grossprofit ratio = gross profit
net sales
(v) Net profit to Net worth ratio = net profit after taxes
shareholders! net worth
× 100
Dividend per share
market value per share
(vi) Dividend yield ratio =
(vii) Price earnings ratio = market price per share
earning per share
× 100
× 100
(viii) Net profit ratio = operating profit
net sales
× 100
(ix) Inventory ratio = net sales
inventory value
(x) Overall profitability ratio = net profit
total assets

Depreciation
► Reduction in value of a product due to aging is called
depreciation.
► The rate of depreciation is affected by the wear, tear and
damages.
► The value of a product is reduced using certain formulae at
the end of every year.
► At the end of every year, the value of asset should be
calculated after allowing for cumulative depreciation from the
date of purchase to the date in question.
► Asset cost: The amount of money spent to purchase an
asset is called asset cost.
► Life span: The useful service period of an asset (machinery,
vehicle, building, etc.) is called life span.
► Salvage value of an asset: The monetary value obtained
when disposing an asset after its useful life span is called
salvage value.

Depreciation formulae
► Straight line method: Based on the straight line method,
annual rate of depreciation is calculated usign a linear
formula. This method is suitable for asset having known
lifespan in years.
Book value = Asset cost−
(Asset cost − Salvage value)
Life span
×Age in yea
► Units of production method: When the number of units
produced during useful lifespan of an asset it known,
depreciation till date can be calculated using the following
formula:
Book value = Asset cost−
(Asset cost − Salvage value)
Capacity of machine in units
×Number o
► Double depreciation method: Double depreciation method
permits higher depreciation at the beginning of lifespan and
lower distribution near the end of life span of an asset.
Book value = Asset cost−2×Straight line depreciation×Book value

Stock management
► Purchase, storage and issue of stock is called stock
management.
► Reorder level: The safe stock level on reaching which new
stock may be ordered without affecting production process is
called reorder level.
► Overstocking: Purchase of excess stock which reduces
money flow is called overstocking.
► Understocking: Keeping stock levels much lower than the
demand levels for maintaining continuous production is called
understocking.

► VAT: The tax payable for the increase in value of an item due
to manufacturing process is called Value Added Tax (VAT).
► VAT is applicable on the difference between sale price of
finished product and the cost of raw materials.
► Increase in price of raw materials results in levy of Value
Added Tax.
► VAT is applied in several stages in proportion to the amount
of increase in value of an item.
► Consider that the cost of raw materials is Rs.200, the price of
finished product is Rs.600 and the rate of VAT is 4%. The
Value Added Tax payable may be calculated as shown below:
4
4 4
VAT = (Cost of finished product − cost of raw materials)
100
= (600 − 200) ×
100
= 400 ×
100
= Rs.16
.
► Sevaral taxes, including VAT, have been replaced by a single
tax called Goods and Services Tax (GST).

Cash flow
► The movement of money into and out of a business is called
cash flow.
► If the inflow of money is greater than the outflow of money, a
business is said to grow.
► If the outflow of money is greater than the inflow of money, a
business is said to decline.
► Inflow of money is different from net profit. Inflow of money
may be due to profit, loans and proceeds of selling asset.
► Outflow of money is different from net loss to a business.
Outflow of money may be due to purchase of inventory, cost
of production, purchase of asset, repayment of loan or loss in
business.

Fund flow
► Fund is money held in the form cash, account balance and
asset.
► Fund flow is inward and outward movement of cash, account
balance and asset values of a company.
► Cash flow is one part of fund flow.
► Fund flow is analysed every month and at the end of every
quarter (3 months period) of a financial year.

Introduction to Tally
► Tally is an accounting software.
► Tally supports cash accounting, inventory and payroll
accounting.
► Tally supports multiple accounts and accounting vouchers.
► Tally can maintain accounts for multiple companies on the
same computer.
► Tally supports multiple languages.
► Security for each company can be provided through Tally.
► Tally can maintain tax and liability accounts.

Features and advantages of Tally
► Tally has an easy user interface.
► Tally allows data entry in many languages.
► Tally supports double entry system of accounting where each
amount is enterered in credit and debit sides to balance the
transactions.
► Tally allows creation and maintenance of 99,999 companies.
► Tally allows generation of several accounting reports.
► Tally allows viewing product-wise inventory level.
► Tally allows maintaining reorder levels.
► It calculates profits, losses, income and expenditure and
readily displays the reports.
► Tally allows creation of multiple godowns for inventory
management.
► Tally supports the creation of cost centre and profit centre.

► Tally can produce balance sheets and trial balances without
much effort.
► Tally analyse the all ratios required to ascertain the
performance of a company.
► It is easy to detect and correct errors in transaction entries.
► Since Tally supports double entry system, the account is
almost always balanced.
► Stock items may have multiple unit types. Tally supports
compound units createdout of certain basic units.
► Tally highlights any negative balance using red letters, so that
the result of an overdraft transaction may be viewed even
before committing the transaction.

Implementing accounts in Tally
► The first step towards implementing accounts is to create a
company. Pressing Alf+F3 (Company Info) brings the
company menu. Choose Create company to create a new
company.
► After creating a company, press F11 to enable features of the
company. Enable Payroll, invoicing, budgeting, etc from
accounting features. Similary, inventory features and statutary
and taxation features can be enabled from the respective
menus under Company Features.
► Configuration of accounting details like Groups, Ledgers,
Budget, Scenarios and voucher types is possible using
Gateway of Tally− >Accounts Info.
► Payroll may be configured using Gateway of Tally-¿Payroll
Info. It supports Employee groups, Employees, Units (Work),
Attendance/ Production Types, Pay Heads, Salary Details and
Voucher Types can be controlled using this menu.
► Inventory details like Stock Groups, Stock Categories

Double entry system of Book keeping
► Double entry system mandates that each transaction has 2
entries, one under debit and another under credit.
► Under double entry system, an account which takes money is
debited and and the account which supplies money is credited.
► Double entry system permits balancing of all accounts to
check whether the sum of debits is equal to the sum of credits.
► Double entry system relies on the principle that for any debit
made to one account, corresponding credit is made to some
other account.
► Tally offers budgeting through GoT− >Accounting
Info− >Budgets.

Budgeting Systems
► The system of allotting money for specific purposes and
ensuring that the purposes are achieved at the end of specific
period is called budget.
► Budget can be short term (monthly, quarterly, annual, etc.) or
long term (5 year plan, 10 year plan, etc.).
► Budget provides a specific monetary target for achieving
desired goals of the year.
► Budgeting provides a control (or capping) towards each item
of expenditure.
► Each head of budget can be controlled by separate individual
and the works related to a particular head can be accelerated
independent of other heads.
► To create a budget item, use GoT− >Accounts
Info− >Budgets− >Create.
► Choose GoT− >Display− >Trial Balance and press Alt+B to
display budget details along with the account details.

Scenario management
► Creating several hypothetical vouchers to measure the impact
of changes to the accounting system is called scenario
management.
► Scenario allows imposes several new changes to be made to
the accounts. These changes will help to arrive at a strategy
which is suitable for tiding over specific situations.
► Each scenario presents an alternative way out from a difficult
situation.
► Creating different scenarios through voucher entries does not
affect the original account.
► Scenario is an effort to guess the real world action-reaction
sequence to arrive at the right decision.
► Scenario can be created using GoT− >Accounts
Info− >Scenario. Provide a name and include the types of
vouchers applicable for scenario.
► Voucher entry for scenario is made using Reversing Journal
(F10) under Accounting Vouchers.

Variance Analysis
► Variance analysis in Tally aims to compare the difference
between actual performance of a company against budget
goals.
► Choose GoT− >Display− >Trial Balance.
► Press Alt+B to display budget heads. Select the type of head
to be displayed for comparison with actual expense.

Costing Systems
► Costing is the calculation of the amount of money spent on
fulfilling an order or making a product.
► A break up of cost can be provided through the analysis of
inventory expenses, salary, overhead expenses, etc.
► Cost centres can be created (using Features (F11) from GoT)
to maintain several cost centres for a company.

Concepts of Ratios
► Measuring performance of a company against available
resources for performance is called ratio.
► Ratio is a unitless number, ranging from 0 to 1, which
indicates the performance of a company against specific
criteria.
► Ratio could also be expressed in the form a percentage after
multiplying the ratio by 100.
► Tally automatically displays the ratios related to a company
under GoT− >Ratio Analysis.
► The ratios displayed by default on the right side of the ratio
analysis screen include current ratio, quick ratio, debt/equity
ratio, gross profit, net profit, operating cost, recovery turnover
in days, return on investment and return on working capital.

Analysis of financial statements
► Balance sheet & profit and loss are the most important
financial statements provided by Tally (as per Schedule VI of
the Companies Act).
► Other statements of account are available under
GoT− >Display− >Statement of Accounts. This menu
provides Outstanding and Statistics for display of statement.
► A statement of inventory is available under
GoT− >Display− >Statement of Inventory.

Inventory Basics
► Inventory is the stock of items maintained for production
purpose.
► Inventory Groups are the basic groups under which Inventory
Items can be created.
► Each item may have an optional Category, which should be
enabled using Features (F11) from the GoT.
► Units of measure like No., metre etc. can be created using
Units of Measure avaiable under GoT− >Inventory Info.
► Two simple units can be combined using appropriate
conversion factor to create a compound unit.
► Inventory items can be Purchased (F9) and Sold (F8) through
GoT− >Accounting Vouchers.
► Inventory items can be ordered (Purchase Order (Alt+F4)/
Sales Order (Alt+F4) GoT− >Accounting Vouchers.)

POS Invoicing
► Tally allows creating Point Of Sale (POS) voucher using
GoT− >Accounts Info− >Voucher Types− >Create. Enter
POS Voucher against name, Sale against under, Automatic
against voucher numbering.
► To create a sales voucher, choose GoT− >Accounting
Vouchers, press F8 for sales voucher, select POS Voucher,
enter name of buyer, enter delivery note details, select Sales
Ledger against sales ledger, Choose items for sale, enter rate.
Accept the sales transaction.
► POS transactions are subject to Value Added Tax (VAT). You
may configure VAT using F11 key from the Gateway of Tally.

TDS, TCS, FBT, VAT & Service Tax
► TDS: Tax Deducted at Source. It is deducted from salary/
other payment.
► TCS: Tax Collected at Source. It is collected from sale/ other
receipts.
► FBT: Fringe Benefit Tax. It is the tax paid by an employer
towards small benefits, coupons, facilities provided to the
employees.
► VAT: Value Added Tax. Value added tax is levied against
goods sold.
► Service Tax: The tax levied by the Government against the
monetary value of services offered by a firm to its customers.
► In Tally, all taxes can be enabled or disabled using
GoT− >Features (F11)− >Statutory & Taxation.
► Tax reports can be printed from GoT− >Display− >Statutory
Reports.

Tally Interface in Different Languages
► The interface and reports of tally can be changed to a
different language by pressing Alt+G from the Gateway of
Tally (GoT).
► Tally ERP 9 supports 13 languages including Tamil. Choose
any language of your choice.

E-Commerce
Definition of E-Commerce, types, scope and benefits of
E-Commerce. Difference between E-Commerce and traditional
commerce. Capabilities requirements and technology issues
for E-Commerce. Types of E-Commerce web sites. Building
business on the net. Concepts of on line catalogues, shopping
carts, Checkout pages. Payment and order Processing,
authorization, chargeback and other payment methods.
Security issues and payment gateways.

Definition of E-Commerce
1 e-commerce stands for electronic commerce, which means
selling or buying goods through electronic means like Internet,
phone line, sms, etc.
2 Selling or buying goods through electronic means (based on
product description and photos) is called E-Commerce.
3 e-commerce may be carried out over phone line, SMS or the
Internet.
4 The buyer relies upon the description, photos and videos of
the product being sold online to make a decision.
5 e-commerce involves to entities (the buyer and the seller)
connected through a common platform.

Types of e-commerce
1 B2B or Business to Business: When the seller is a business
firm and the buyer too is business firm (not an individual
consumer), the e-commerce transaction is called B2B or
Business to Business transaction.
2 B2C or Business to Consumer: When the seller is an online
business firm and the buyer is an individual, the online
business transaction is called B2C or Business to Consumer.
3 C2B or Consumer to Business: When the seller is an
individual and the buyer is a business firm, the online business
model is called C2B or Consumer to Business.
4 C2C orConsumerto Consumer: When the seller and the
buyer are both individuals, the online business model is called
C2C or Consumer to Consumer.

Scope of e-commerce platform
1 e-commerce platforms like quikr, olx, etc. have local scope.
2e-commerce platforms like Flipkart, Shopclues, Snapdeal, etc.
3 e-commerce platforms like eBay, amazon, etc. have global
scope in electronic commerce.
4 Scope of the e-commerce platform ranges from local level to
global level.
5 Benefits

Benefits of e-commerce
1 Electronic commerce helps the buyer to choose the most
competitive price for a product from several alternate sellers.
2 e-commerce allows a seller to fetch competitive price for
products.
3 e-commerce helps a consumer to order a product from far off
places, even if such product is not available in the local
market.

Disadvantages of e-commerce
1 Descriptions and photos provided by the seller may not match
the delivered product.
2 A product may get damaged during transit, since the seller
and the buyer are located at far off places.
3 The buyer may fail to pay for a product.
4 The buyer might return the product after using it for few
days, which could result in the loss of transit and other
expenses to the seller.
5 The buyer might get delivery of the product on the expected
date.

Difference between E-Commerce and traditional commerce
Table: Difference between E-Commerce and traditional commerce
No. e-commerce traditional commerce
1
Buyer cannot touch or feel the
product before buying.
Buyer can examine the product
before buying.
2 Bargaining is restricted. Bargaining is possible.
3
Shipping time results in delay in
getting the product. Immediate delivery of product.
4
User needs to figure out the us-
age procedure by himself.
Usually, a demo is given at the
shop floor.
5
Testing a product before pur-
chase is not possible.
Testing before purchase is pos-
sible.
6
In case of dispute, the buyer
and
seller need to be fluent in a
common language (like
English).
Conversations regarding a prod-
uct are easy.
7
e-commerce platform allows
manufacturers to
speedily
distribute their new products.
Product infiltration through the
market chain takes time.
8
Fraudulant platforms might re-
sult in loss to the buyer.
The buyer can be assured of
product delivery for the money

Capabilities required for e-commerce
1 An e-commerce platform should provide a cart, where items
may be added or removed.
2 Options for payment through CoD (Cash on Delivery), credit
card, debit card, netbanking and wallet transfer should be
supported by the platform.
3 e-commerce platform should provide a dedicated transport
mechanism to deliver the products on specified time line.
4 The buyer and seller should be permitted to share and rate
their experience for each online transaction.

Technology issues for e-commerce
1 The online platform should provide secure transaction facilities
to prevent fraudsters from cheating a buyer or seller.
2 The payment gateway should be secure and be available
24 × 7.
3 Reward points and redemption system should be provided to
encourage the buyer.
4 Broken Internet connection before completing a transaction
might result in loss of money to the buyer.

Types of E-Commerce web sites
1 Transactional type sites: In transactional type, physical
stores provide an online alternative. Customers can either visit
the physical store or the online store to get a product.
2 Informationdelivery sites: Large manufacturers might run
websites simply to disseminate information about their
products. These sites might include online fora for discussion
on technical issues.
3 e-market place: This type of website permits registration of
buyers and sellers. The e-marketplace functions as the
facilitator between the buyer and the seller and takes
commission amount for the service.

Building business on the net
1 Building an online business requires the seller to create visuals
and descriptions for the products.
2 The seller should ensure that the description is unambiguous.
3 The seller should keep the buyer updated about each stage of
the online transaction from purchase to eventual delivery of
product.
4 The seller should ensure that the buyer is provided a pleasant
experience through all stages of his transaction.
5 The buyer should have the service and support for the online
product.
6 The online business platform should provide an easy interface
to the users.

► Providing full description of a product sold online is called the
online catelogue.
► The online catelogue shoud describe all physical and internal
features.
► The online catelogue should provide clear instructions for
operating a product.
► Online catelogue should provide clear price tag for each
product.
► Online catelogue should describe defects, if any, in the
product.

Shopping cart
► The place for keeping all selected items before final checkout
from an online store is called a cart.
► Cart provides facility to add, remove or modify products
through online.
► Cart items are deleted when a purchase transaction is made
online.

Checkout pages
► After adding items to the cart, the customer is provided
detailed list of items, quantities, rates and amounts for each
transaction.
► When the user provides confirmation that the items in the
cart are really meant to be purchased, the checout page
redirects the user to payment page.

Payment for e-commerce transaction
► Payment for an online transaction may be made through the
following methods:
(i) Cash On Delivery (COD): The buyer pays money when the
product is delivered.
(ii) Credit card: A card bearing 16 digit number, expiry month &
year, name of card holder and a Card Verification Value (CVV)
and permitting permitting spending first and collection on later
date is called credit card. This card permits payment of money
for goods and services. This amount should be paid up during
the credit card bill cycle. Credit card permits conversion of
large purchase amount to EMI (Equated Monthly Installment)
payment.
(iii) Debit card: A card bearing 16 digit number, expiry month &
year, name of card holder and a Card Verification Value (CVV)
is called and permits spending the money already debosited in
an account is called debit card. This card permits payment of
money for goods and services from prepaid deposits.
(iv) Internet banking: Internet banking permits logging in to a
bank site using an ID and password and authorizing the online
payment. Some banks send an OTP (One Time Password) to

Security issues for online payment
► The user should ensure that green color lock icon appears
near the address bar of the browser.
► The user should ensure that the lock icon is not crossed out.
► The user should ensure that the Internet connection is stable
for completing payment transaction in one go.
► The user should ensure that the payment transaction is
completed within the shortest possible time limit. Otherwise,
the session might expire and the money may remain unpaid to
the e-commerce site, but debited from the bank account of
the user.
► The user should ensure that the payment URL begins with
https, which is a secure communication protocol over hyper
text transmission protocol.

Payment gateway
► A third party online payment system which receives money
from the buyer and transfers the same to the seller is called a
payment gateway.
► CCAvenue, PaySeal, PayPal, etc. are some of the common
payment gateways.
► For each successful transaction, the payment gateway takes a
commission and transfers the remaining amout to the account
of the beneficiary.

Cyber security
Overview of Information Security, security threats, information
security, vulnerability and risk management. Introduction to
Directory Services, Access Control, Software Development
Security, Privacy protection, Audit and Security. Introduction
to I.T. Act and penalties for cybercrimes.

Cyber security
1 Protecting computer users from online attacks aimed at
damaging the data, software, monetary loss or any other
damages is called cyber security.
2 The term cyber means interaction of computers through
Network.
3 Cyber crime is a malafide act happening inside the networking
domain.
4 Victims of cyber crimes might loose data or money.

Information security
► Information security is the practice of preventing unauthorized
use of information.
► Information Security is abbreviated to InfoSec.
► Under information security, any device having processor and
memory is categorised under computing device.
► Keeping the data of a device safe from unauthorized users is
called information security.
► CIA: CIA is the abbreviation for Confidentiality, Integrity &
Availability under information security.

Threats to information security
► Worms: Worms are little scripts sent through email
attachments. These enter the computer system when user tries
to open the attachment. Worms might result in scare, loss of
data from the system.
► Phising attacks: Creating a cheat URL resembling an authentic
website and making the victim to reveal login credentials is
called phishing attack. In most of the cases, phishing victims
innocently reveal bank login details, which are misused by the
attacker.
► Trojans: A normal looking program may have an embedded
malware. The malware might collect sensitive data and transmit
the same to the attacker.
► Computer virus: A malicious which becomes hooked to the
opearating system and keeps continuously working to damage data
stored in the device is called virus. Virus spreads through Internet,
storage media like pen drive, etc.
► Breach of information security might result in theft of
proprietory manufacturing processes or fomulae from large

Vulnerability
► Sources of weakness in the IT infrastructure for potential theft
of information is called vulnerability.
► Vulnerabilities may be found in the operating system. These
vulnerabilities are targeted by hackers and exploited.
► The network connection might be insecure due to lack of
firewall, anti-virus and other online protection software
packages.
► An application software might include a vulnerability. When
this software runs, hackers may intrude the system and cause
damages.
► Failure to conduct periodic security audit of computer systems
might result in data vulnerability.
► Identifying sources of data disruption and ensuring continuous
safety of business data is called risk management.

Risk management
► The likelihood of loss of data due to security vulnerability is
called risk.
► Risk management is the process of ensuring smooth functioning
of business without permitting any attack on the information
held by an organization.
► A team of people calculate the risk faced by an organization
based on existing vulnerabilities and sources of threat. The
team decides upon the safe practices, software and hardware
implementations to be adopted for complete information safety.
► To ensure information safety, an organization should have
(i)security policy, (ii)organization of information security,
(iii)human resource security, (iv)access control, (v)physical
security, (vi)security incident management, (vii)safe disposal of
damaged hard copies, (viii)safe disposal of damaged storage
media.

Introduction to Directory Services
► Directory service is a single access point which could take a
user to sevel other services located at different URLs.
► The directory service simplies the job of security administrator
to the safe maintenance of directory service alone.
► Directory service may store data in several computers. But,
the user should find that the directory is a single point.
► The directory service should be able to include new objects
based on changes to network.
► Searching for information from various locations on the
network should be easy.
► The directory system should be independent of the physical
location of the user or the administrator.
► The information stored in directory service should be
accessible from any operating system.
► LDAP (Light Weight Directory Access Protocol) provides an
easy mechanism for querying directory service.

Access control
► Access control is the selective permission to particular
individuals to access a computer and perform their works.
► Access control may be physical security to the computer.
Users may be permitted to use the computer only if they are
authenticated through smart card, finger print, iris scan, etc.
► Access control may be implemented through software. Users
may be required to provide a valid pair of identifier (ID) and
password.
► Access control may be implemented through a combination of
physical and software controls.
► The layout of the access control components is called access
control topology.

Software development security
► Security is implemented at the development stage of a
software.
► Security of software is designed to cover the entire life cycle of
software.
► Software Development Life Cycle (SDLC) is the planning of
the security measures to be incorporated in a software
throughout the life span of the software.
► Protection from disclosure: is the prevention of disclosure
of source code by any individual involved in the development
of a software product.
► Protection from alteration: The source code should not be
altered without appropriate authorization.
► Protection from destruction: Any individual should not
have the right to delete or destroy the entire software.
► Whoismakingthe request: Any request for changing or
deleting software components should be recorded.
► Verify access rights: Any request from a user should be

Privacy protection
► Data relating to several types of individuals may be held in
the IT infrastructure of an organization.
► Protecting the data from unauthorized access is called privacy
protection.
► Breach of privacy protection might result in huge damage to
individuals and organizations.
► Medical records of patients, record of criminals, financial data
of companies, genetic material, address and contact details of
individuals, record of web surfing behaviour, record of credit
card, debit card or Internet banking creditials are some of the
privacy data which should not be compromized.

Information security audit
► Information security is audited by a team of experts with
reference to vulnerabilities, threats and preventive measures
for data protection.
► The information security audit thoroughly analyses all threat
events of the past and formulates security measures for the
future.
► Information security audit should be performed in a periodic
manner, i.e., once every month, every quarter, etc.
► Seggregation of duties should be adopted to ensure that no
single employee has all the data needed to make a fraudulant
transaction.
► All segments of the organization should be protected through
physical and password security measures.
► The audit team should ensure that customers of the
organization can feel safe when their data is divulged for
business purpose.
► IT audit should probe abnormal behaviour of any individual,

Introduction to I.T. Act
► Information Technology Act, 2000 was introduced to prevent
and punish cyber crimes.
► I.T. Act provides support for ecommerce.
► I.T. Act protects individuals from being victimized by cyber
frauds.
► A major amendment to the IT act was made in 2008.

Penalties for cybercrimes
Table: Cyber crimes and punishments
No. Section Cyber crime Max. Imprisonment Max. Fine Both imp’ a
1 65 Tampering with computer source documents
2 years 2Lakh Yes
2 66 Hacking
3 years 5Lakh Yes
3 66B Receiving stolen computer/ mobile
3 years 1Lakh Yes
4 66C Misuse of password
3 years 1Lakh Yes
5 66D Cheating with computer
3 years 1Lakh Yes
6 66E Publishing private images of others
3 years 2Lakh Yes
7 66F Cyber terrorism
Life − No
8 67 Publishing obscene content
5 years 1Lakh Yes
9 67A Publishing sexual content
7 years 1Lakh Yes
10 67B Publishing child porn
5 years
(first); 7
years (sub-
sequent)
1Lakh
(first);
1Lakh
(subse-
Yes

https://www.w3schools.com/js/js htmldom.asp
https://www.javatpoint.com/document-object-model
https://en.wikipedia.org/wiki/Visual Basic for Applications

copa-ii.pptx

More Related Content

What's hot (9)

Similar to copa-ii.pptx (20)

Recently uploaded (20)

copa-ii.pptx