C Programs

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Decision Making Programs in C

Check whether a number is divisible by 5 and 11

Introduction

Divisibility means a number can be divided by another number without leaving a remainder.

• If number % 5 == 0, it is divisible by 5.
• If number % 11 == 0, it is divisible by 11.

In this program, we check whether the given number is divisible by both 5 and 11.

C Program: Check whether a number is divisible by 5 and 11

#include <stdio.h>
 
int main() {
    int num;
 
    // Input number
    printf("Enter a number: ");
    scanf("%d", &num);
 
    // Check divisibility
    if (num % 5 == 0 && num % 11 == 0) {
        printf("%d is divisible by both 5 and 11.\n", num);
    }
    else {
        printf("%d is not divisible by both 5 and 11.\n", num);
    }
 
    return 0;
}
    

 
OUTPUT 1 :
Enter a number: 55
55 is divisible by both 5 and 11.

OUTPUT 2 :
Enter a number: 25
25 is not divisible by both 5 and 11.

OUTPUT 3 :
Enter a number: 110
110 is divisible by both 5 and 11.

Explanation

1. User enters an integer.
2. The program uses the modulus operator % to check if the number gives remainder 0 when divided by 5 and
3. If both conditions are true → divisible by 5 and 11.
4. Otherwise → not divisible by both.