Top 30 programming questions on For loop in C Programming
Q 1. Write a program to print numbers from 1 to 10 using a `for` loop.
Expected Output:
1 2 3 4 5 6 7 8 9 10
Q 2. Write a program to print the sum of the first 10 natural numbers using a `for` loop.
Expected Output:
Sum = 55
Q 3. Write a program to print the multiplication table of a given number using a `for` loop.
Expected Output:
Enter a number: 5
5 x 1 = 5
5 x 2 = 10
...
5 x 10 = 50
Q 4. Write a program to calculate the factorial of a given number using a `for` loop.
Expected Output:
Enter a number: 5
Factorial = 120
Q 5. Write a program to print the first `n` even numbers using a `for` loop.
Expected Output:
Enter a number: 5
2 4 6 8 10
Q 6. Write a program to find the sum of the digits of a given number using a `for` loop.
Expected Output:
Enter a number: 1234
Sum of digits = 10
Q 7. Write a program to print all odd numbers between 1 and 50 using a `for` loop.
Expected Output:
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49
Q 8. Write a program to reverse a given number using a `for` loop.
Expected Output:
Enter a number: 1694
Reversed number = 4961
Q 9. Write a program to check if a given number is prime using a `for` loop.
Expected Output:
Enter a number: 29
29 is a prime number
Q 10. Write a program to calculate the sum of squares of the first `n` natural numbers using a `for` loop.
Expected Output:
Enter a number: 3
Sum of squares = 14
Q 11. Write a program to print the first `n` Fibonacci numbers using a `for` loop.
Expected Output:
Enter number of terms: 5
0 1 1 2 3
Q 12. Write a program to calculate the sum of the series `1 + 1/2 + 1/3 + ... + 1/n` using a `for` loop.
Expected Output:
Enter a number: 5
Sum = 2.28333
Q 13. Write a program to find the greatest common divisor (GCD) of two numbers using a `for` loop.
Expected Output:
Enter two numbers: 36 60
GCD = 12
Q 14. Write a program to check if a given number is a palindrome using a `for` loop.
Expected Output:
Enter a number: 121
121 is a palindrome
Q 15. Write a program to print all prime numbers between 1 and 100 using a `for` loop.
Expected Output:
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
Q 16. Write a program to find the sum of all even numbers between 1 and 100 using a `for` loop.
Expected Output:
Sum = 2550
Q 17. Write a program to print all numbers divisible by both 3 and 5 between 1 and 100 using a `for` loop.
Expected Output:
15 30 45 60 75 90
Q 18. Write a program to print the reverse of a given string using a `for` loop.
Expected Output:
Enter a string: Hello
Reversed string: olleH
Q 19. Write a program to calculate the sum of the digits of all prime numbers between 1 and 50 using a `for` loop.
Expected Output:
Sum of digits of primes = 30
Q 20. Write a program to print the following pattern using a `for` loop:
*
**
***
****
*****
Q 21. Write a program to calculate the product of the digits of a given number using a `for` loop.
Expected Output:
Enter a number: 123
Product of digits = 6
Q 22. Write a program to print all factors of a given number using a `for` loop.
Expected Output:
Enter a number: 20
Factors: 1 2 4 5 10 20
Q 23. Write a program to calculate the sum of the first `n` odd numbers using a `for` loop.
Expected Output:
Enter a number: 5
Sum = 25
Q 24. Write a program to print all perfect squares between 1 and 100 using a `for` loop.
Expected Output:
1 4 9 16 25 36 49 64 81 100
Q 25. Write a program to check if a given number is an Armstrong number using a `for` loop.
Expected Output:
Enter a number: 153
153 is an Armstrong number
Q 26. Write a program to find the LCM of two numbers using a `for` loop.
Expected Output:
Enter two numbers: 12 18
LCM = 36
Q 27. Write a program to print the ASCII values of characters from `a` to `z` using a `for` loop.
Expected Output:
a = 97
b = 98
...
z = 122
Q 28. Write a program to calculate the sum of all prime numbers between 1 and 100 using a `for` loop.
Expected Output:
Sum = 1060
Q 29. Write a program to print the first `n` terms of the series `1, 4, 9, 16, ...` using a `for` loop.
Expected Output:
Enter a number: 5
1 4 9 16 25
Q 30. Write a program to print the sum of the squares of the digits of a given number using a `for` loop.
Expected Output:
Enter a number: 123
Sum of squares of digits = 14
Bikki Singh
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