practice problems on functions IN SWIFT
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This document contains 28 programming problems involving functions in Swift. The problems cover a range of tasks including: calculating sums and differences of integers; checking strings for certain patterns; manipulating characters in strings; finding largest/nearest values in arrays; and testing various conditions on integers, strings, and arrays.
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practice problems on functions IN SWIFT
- 1. Practice problems on functions 1. Write a Swift program to compute the sum of the two integers. If the values are equal return the triple their sum. 2. Write a Swift program to compute and return the absolute difference of n and 51, if n is over 51 return double the absolute difference 3. Write a Swift program that accept two integer values and return true if one of them is 20 or if their sum is 20. 4. Write a Swift program to accept two integer values and return true if one is negative and one is positive. Return true only if both are negative. 5. Write a Swift program to add "Is" to the front of a given string. However, if the string already begins with "Is", return the given string. 6. Write a Swift program to remove a character at specified index of a given non-empty string. The value of the specified index will be in the range 0..str.length()-1 inclusive 7. Write a Swift program to change the first and last character of a given string. 8. Write a Swift program to add the last character (given string) at the front and back of a given string. The length of the given string must be 1 or more. 9. Write a Swift program to check if a given non-negative number is a multiple of 3 or a multiple of 5. 10. Write a Swift program to take the first two characters from a given string and create a new string with the two characters added at both the front and back. 11. Write a Swift program to test a given string whether it starts with "Is". Return true or false. 12. Write a Swift program that return true if either of two given integers is in the range 10..30 inclusive. 13. Write a Swift program to check if a given string begins with "fix", except the 'f' can be any character or number. 14. Write a Swift program to find the largest number among three given integers. 15. Write a Swift program that accept two integer values and to test which value is nearest to the value 10, or return 0 if both integers have same distance from 10. 16. Write a Swift program that accept two integer values and test if they are both in the range 20..30 inclusive, or they are both in the range 30..40 inclusive. 17. Write a Swift program that accept two positive integer values and test whether the larger value is in the range 20..30 inclusive, or return 0 if neither is in that range. 18. Write a Swift program to test whether the last digit of the two given non-negative integer values are same or not. 19. Write a Swift program to convert the last three characters in upper case. If the string has less than 3 chars, lowercase whatever is there. 20. Write a Swift program to check if the first instance of "a" in a given string is immediately followed by another "a".
- 2. 21. Write a Swift program to create a string made of every other char starting with the first from a given string. So "Python" will return "Pto" 22. Write a Swift program to count the number of 7's in a given array of integers. 23. Write a Swift program to check if one of the first 4 elements in a given array of integers is a 7. The length of the array may be less than 4. 24. Write a Swift program to test if the sequence of numbers 0, 1, 2 appears in a given array of integers somewhere. 25. Write a Swift program to create a new string where all the character "a" have been removed except the first and last positions. 26. Write a Swift program to create a string taking characters at indexes 0, 2, 4, 6, 8, .. from a given string 27. Write a Swift program to count the number of times that two 7's are next to each other in a given array of integers. 28. Write a Swift program to test whether a value presents sequentially three times in an array of integers or not.