Top 30 C Programming Practice Exercises for Beginners

11. Calculate simple interest.

Required Input:

principal = 1000, rate = 5, time = 2

Expected Output:

Simple Interest = 100.00

Code In C

#include <stdio.h> int main() { float principal = 1000, rate = 5, time = 2; float interest; // Logic to calculate simple interest return 0; }

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12. Check if a character is a vowel.

Required Input:

ch = 'a'

Expected Output:

Vowel

Code In C

#include <stdio.h> int main() { char ch = 'a'; // Logic to check for vowel return 0; }

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13. Calculate power of a number.

Required Input:

base = 2, exponent = 3

Expected Output:

Power = 8

Code In C

#include <stdio.h> int main() { int base = 2, exponent = 3; int result = 1; // Logic to calculate power return 0; }

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14. Find the GCD of two numbers.

Required Input:

a = 8, b = 12

Expected Output:

GCD = 4

Code In C

#include <stdio.h> int main() { int a = 8, b = 12; int gcd; // Logic to find GCD return 0; }

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15. Check if a number is prime.

Required Input:

num = 17

Expected Output:

Prime

Code In C

#include <stdio.h> int main() { int num = 17; int is_prime = 1; // Logic to check for prime return 0; }

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16. Find the LCM of two numbers.

Required Input:

a = 4, b = 5

Expected Output:

LCM = 20

Code In C

#include <stdio.h> int main() { int a = 4, b = 5; int lcm; // Logic to find LCM return 0; }

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17. Check if a number is an Armstrong number.

Required Input:

number = 153

Expected Output:

Armstrong Number

Code In C

#include <stdio.h> int main() { int number = 153; int sum = 0, temp, remainder; // Logic to check Armstrong number return 0; }

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18. Reverse a string.

Required Input:

str = "hello"

Expected Output:

olleh

Code In C

#include <stdio.h> #include <string.h> int main() { char str[] = "hello"; char reversed[100]; // Logic to reverse the string return 0; }

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19. Find the sum of even numbers up to n.

Required Input:

n = 10

Expected Output:

Sum = 30

Code In C

#include <stdio.h> int main() { int n = 10; int sum = 0; // Logic to calculate sum of even numbers return 0; }

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20. Check if a string is a palindrome.

Required Input:

str = "madam"

Expected Output:

Palindrome

Code In C

#include <stdio.h> #include <string.h> int main() { char str[] = "madam"; int is_palindrome = 1; // Logic to check palindrome return 0; }

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