C Exercises: Reads in two integers and check whether the first integer is a multiple of the second integer

Last update on September 18 2025 12:35:25 (UTC/GMT +8 hours)

Check if the first integer is a multiple of the second

Write a C program that reads two integers and checks whether the first integer is a multiple of the second integer.

Sample Input: 9 3

Sample Solution:

C Code:

#include<stdio.h>
// Function to check if n1 is a multiple of n2
int is_Multiple(int n1, int n2)
{
    return n1 % n2 == 0;
}

int main()
{
    int n1, n2;
   
    // Prompt for user input
    printf("Input the first integer : ");
    scanf("%d", &n1);
    printf("Input the second integer: ");
    scanf("%d", &n2);

    // Check if n1 is a multiple of n2 and print result
    if(is_Multiple(n1, n2))
        printf("\n%d is a multiple of %d.\n", n1, n2);
    else
        printf("\n%d is not a multiple of %d.\n", n1, n2);

    return 0;
}

Sample Output:

Input the first integer : Input the second integer: 
9 is a multiple of 3.

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C program to check if one integer is a multiple of another using the modulus operator.
• Write a C program to determine if the first number is an exact divisor of the second, handling zero appropriately.
• Write a C program to verify multiplicity for two numbers using a custom function and recursion.
• Write a C program to check if the first integer is a multiple of the second and output the quotient if true.

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