Practice 50 Swift Basics Programming Questions

Practice 50 Swift Basics Programming Questions

Q1. Write a Swift program to print "Hello, World!" to the console.  
Expected Output:  
Hello, World!

Q2. Write a Swift program to declare a constant and print its value.  
Input:  
let x = 10  
Expected Output:  
10

Q3. Write a Swift program to declare a variable and modify its value.  
Input:  
var y = 5  
y = 10  
Expected Output:  
10

Q4. Write a Swift program to calculate the sum of two integers and print the result.  
Input:  
let a = 5, b = 7  
Expected Output:  
12

Q5. Write a Swift program to find the product of two numbers.  
Input:  
let a = 3, b = 4  
Expected Output:  
12

Q6. Write a Swift program to check if a number is positive, negative, or zero.  
Input:  
let num = -5  
Expected Output:  
Negative

Q7. Write a Swift program to perform basic arithmetic operations (addition, subtraction, multiplication, division).  
Input:  
let a = 8, b = 4  
Expected Output:  
Addition: 12
Subtraction: 4
Multiplication: 32
Division: 2.0

Q8. Write a Swift program to calculate the area of a circle given its radius.  
Input:  
let radius = 5  
Expected Output:  
Area: 78.54

Q9. Write a Swift program to check if a number is even or odd.  
Input:  
let num = 6  
Expected Output:  
Even

Q10. Write a Swift program to find the maximum of two numbers.  
Input:  
let a = 5, b = 10  
Expected Output:  
10

Q11. Write a Swift program to find the minimum of two numbers.  
Input:  
let a = 5, b = 10  
Expected Output:  
5

Q12. Write a Swift program to check if a number is divisible by 3 and 5.  
Input:  
let num = 15  
Expected Output:  
Divisible by 3 and 5

Q13. Write a Swift program to print the Fibonacci series up to the 10th term.  
Expected Output:  
0, 1, 1, 2, 3, 5, 8, 13, 21, 34

Q14. Write a Swift program to print the first 10 multiples of a number.  
Input:  
let num = 3  
Expected Output:  
3, 6, 9, 12, 15, 18, 21, 24, 27, 30

Q15. Write a Swift program to reverse a string.  
Input:  
let str = "Swift"  
Expected Output:  
tfiwS

Q16. Write a Swift program to check if a string is a palindrome.  
Input:  
let str = "madam"  
Expected Output:  
Palindrome

Q17. Write a Swift program to count the number of vowels in a string.  
Input:  
let str = "Hello, World!"  
Expected Output:  
3

Q18. Write a Swift program to find the length of a string.  
Input:  
let str = "Hello"  
Expected Output:  
5

Q19. Write a Swift program to convert a string to uppercase.  
Input:  
let str = "hello"  
Expected Output:  
HELLO

Q20. Write a Swift program to convert a string to lowercase.  
Input:  
let str = "HELLO"  
Expected Output:  
hello

Q21. Write a Swift program to concatenate two strings.  
Input:  
let str1 = "Hello", str2 = "World"  
Expected Output:  
HelloWorld

Q22. Write a Swift program to check if a character exists in a string.  
Input:  
let str = "Hello", char = "e"  
Expected Output:  
Character exists

Q23. Write a Swift program to remove whitespace from a string.  
Input:  
let str = "  Hello World  "  
Expected Output:  
Hello World

Q24. Write a Swift program to find the index of a character in a string.  
Input:  
let str = "Hello", char = "e"  
Expected Output:  
1

Q25. Write a Swift program to split a string into an array of words.  
Input:  
let str = "Swift programming"  
Expected Output:  
["Swift", "programming"]

Q26. Write a Swift program to find the sum of an array of integers.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
10

Q27. Write a Swift program to find the average of an array of integers.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
2.5

Q28. Write a Swift program to sort an array of integers in ascending order.  
Input:  
let arr = [4, 1, 3, 2]  
Expected Output:  
[1, 2, 3, 4]

Q29. Write a Swift program to check if an array contains a specific number.  
Input:  
let arr = [1, 2, 3, 4], num = 3  
Expected Output:  
Array contains the number

Q30. Write a Swift program to find the largest number in an array.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
4

Q31. Write a Swift program to find the smallest number in an array.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
1

Q32. Write a Swift program to remove duplicates from an array.  
Input:  
let arr = [1, 2, 2, 3]  
Expected Output:  
[1, 2, 3]

Q33. Write a Swift program to join an array of strings into a single string.  
Input:  
let arr = ["Hello", "World"]  
Expected Output:  
Hello World

Q34. Write a Swift program to check if an array is empty.  
Input:  
let arr = [1, 2, 3]  
Expected Output:  
Not empty

Q35. Write a Swift program to count the number of elements in an array.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
4

Q36. Write a Swift program to add an element to the end of an array.  
Input:  
let arr = [1, 2, 3], num = 4  
Expected Output:  
[1, 2, 3, 4]

Q37. Write a Swift program to find the index of an element in an array.  
Input:  
let arr = [1, 2, 3, 4], num = 3  
Expected Output:  
2

Q38. Write a Swift program to find the first element in an array.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
1

Q39. Write a Swift program to reverse an array.  
Input:  
let arr = [1, 2, 3, 4]  
Expected Output:  
[4, 3, 2, 1]

Q40. Write a Swift program to find the middle element of an array.  
Input:  
let arr = [1, 2, 3, 4, 5]  
Expected Output:  
3

Q41. Write a Swift program to create and print a dictionary.  
Input:  
let dict = ["name": "John", "age": "30"]  
Expected Output:  
["name": "John", "age": "30"]

Q42. Write a Swift program to add a key-value pair to a dictionary.  
Input:  
let dict = ["name": "John"], newKey = "age", newValue = "30"  
Expected Output:  
["name": "John", "age": "30"]

Q43. Write a Swift program to remove a key-value pair from a dictionary.  
Input:  
let dict = ["name": "John", "age": "30"], key = "age"  
Expected Output:  
["name": "John"]

Q44. Write a Swift program to check if a dictionary contains a specific key.  
Input:  
let dict = ["name": "John", "age": "30"], key = "name"  
Expected Output:  
Contains key "name"

Q45. Write a Swift program to get the value for a given key in a dictionary.  
Input:  
let dict = ["name": "John", "age": "30"], key = "name"  
Expected Output:  
John

Q46. Write a Swift program to merge two dictionaries.  
Input:  
let dict1 = ["name": "John"], dict2 = ["age": "30"]  
Expected Output:  
["name": "John", "age": "30"]

Q47. Write a Swift program to print all keys and values of a dictionary.  
Input:  
let dict = ["name": "John", "age": "30"]  
Expected Output:  
name: John
age: 30

Q48. Write a Swift program to find if a number is present in a dictionary value.  
Input:  
let dict = ["name": "John", "age": "30"], value = "30"  
Expected Output:  
Found value 30

Q49. Write a Swift program to create and access a tuple.  
Input:  
let tuple = (1, "Hello")  
Expected Output:  
1, Hello

Q50. Write a Swift program to return multiple values from a function using a tuple.  
Input:  
func getDetails() -> (Int, String) { return (1, "John") }  
Expected Output:  
1, John