C Programs

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Decision Making Programs in C

Check whether a number is Even or Odd

Introduction

• An even number is divisible by 2 (num % 2 == 0).
• An odd number is not divisible by 2 (num % 2 != 0).

This program takes an integer from the user and determines whether it is even or odd.

C Program: Check whether a number is Even or Odd

 
#include <stdio.h>
 
int main() {
    int num;
 
    // Input number from user
    printf("Enter a number: ");
    scanf("%d", &num);
 
    // Check even or odd
    if (num % 2 == 0) {
        printf("%d is Even.\n", num);
    } else {
        printf("%d is Odd.\n", num);
    }
 
    return 0;
}
   

 

 
OUTPUT 1 :
Enter a number: 12
12 is Even.

OUTPUT 2 :
Enter a number: 7
7 is Odd.

Explanation

1. The user enters an integer.
2. The program uses the modulus operator % to check divisibility by 2:
   • num % 2 == 0 → Even
   • Else → Odd
3. Prints the result accordingly.