C Program to check if a number is divisible by 3 and 5

In this article, we will write a very simple C program to check if a number is divisible by 3 and 5.

C Program to check if a given number is divisible by 3 and 5

This program first takes an integer number as an input from the user. Then, it checks if the number is divisible by both 3 and 5 using the modulo operator %. If the remainder when dividing the input number by 3 is 0 and the remainder when dividing by 5 is 0, then the number is divisible by both 3 and 5, else it is not divisible by both.

#include <stdio.h>

int main() {
    int num;

    // Input number from user
    printf("Enter a number: ");
    scanf("%d", &num);

    // Check if the number is divisible by both 3 and 5
    if (num % 3 == 0 && num % 5 == 0) {
        printf("%d is divisible by both 3 and 5.\n", num);
    } else {
        printf("%d is not divisible by both 3 and 5.\n", num);
    }

    return 0;
}

Output:

Output 1:

Enter a number: 15
15 is divisible by both 3 and 5.

Output 2:

Enter a number: 12
12 is not divisible by both 3 and 5.