Decision_Makoiyuhrttouehgouesygytiuojth0ueyutwaeing.pptx

Decision Making Statements
PRESENTED BY –
VISHAL
REG. NO. – 231302215
B.TECH CSE CYBER SECURITY

If Statement
The if statement is the
most simple decision-
making statement. The if
statement allows us to
execute a block of code
only when specified
condition is true otherwise
it will not execute.

If Statement Syntax
if(Condition)
{
//Statements to execute if condition is true
}

If Statement Example
public class IfStatementExample {
public static void main(String[] args) {
int age = 18;
if (age >= 18) {
System.out.println("You are eligible to vote!");
}
}
}

If-else Statement
The “if-else” statement in Java is
another decision-making
statement that allows you to
execute different blocks of
code based on the condition’s
result. It provides an alternative
statement to execute when
the condition is not true.

If-else Statement Syntax
if(condition) {
//code to be executed if the condition is true
}
else {
//code to be executed if the condition is false
}

Example
public class IfElse {
int n = 10;
if (n > 5) {
System.out.println("The number is greater than 5.");
}
else {
System.out.println("The number is 5 or less.");
}
}
}

Else - if ladder
 The Java if-else-if ladder is
used to evaluate multiple
conditions sequentially. It
allows a program to check
several conditions and
execute the block of code
associated with the first true
condition. If none of the
conditions are true then else
block is executed.

Else - if ladder Syntax
if (condition1) {
// Code to execute if condition1 is true
}
else if (condition2) {
// Code to execute if condition1 is false AND condition2 is true
}
else {
// Code to execute if all conditions are false
}

Else - if ladder Example
public class ElseIfLadderExample {
int marks = 78;
if (marks >= 90) {
System.out.println("Grade: A");
}
else if (marks >= 75) {
System.out.println("Grade: B");
}
else {
System.out.println("Grade: D");
}
}
}

Switch Statement
The switch statement
in Java is a multi-way
branch statement.
The Java switch
statement executes
one statement from
multiple conditions.

Switch Syntax
switch(expression){
case value1 :
// Statements
break; // break is optional
case value2 :
// Statements
break; // break is optional
default :
// default statements
}

Switch Statement Example
public class SwitchExample {
int day = 3;
switch (day) {
case 1:
System.out.println("Monday");
break;
case 2:
System.out.println("Tuesday");
break;
case 3:
System.out.println("Wednesday");
break;
case 4:
System.out.println("Thursday");
break;
case 5:
System.out.println("Friday");
break;
case 6:
System.out.println("Saturday");
break;
case 7:
System.out.println("Sunday");
break;
default:
System.out.println("Invalid day");
}
}
}

While Statement
The while statement in Java repeatedly executes a block of
code as long as a specified condition remains true. The
condition is evaluated before each iteration of the loop. If the
condition is initially false, the loop body will not execute at all.
Syntax :
while (condition) {
// code block to be executed
}

Example
public class WhileExample {
int i = 1;
while (i <= 5) {
System.out.println("Count: " + i);
i++;
}
}
}

For Statement
 For loop in java is a control flow statement used to execute a block
of code repeatedly for a specific number of times , based on
condition.
 For loop initializes a variable , checks a condition before each
iteration and update the variable after every iteration .
Syntax :
for (initialization; condition; increment) {
// code to be executed
}

Example
public class SumExample {
int sum = 0;
for (int i = 1; i <= 10; i++) {
sum += i;
}
System.out.println("Sum of first 10 natural numbers is: " + sum);
}
}

Decision_Makoiyuhrttouehgouesygytiuojth0ueyutwaeing.pptx

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