HARSHAD Number or Not in C Program

Harshad number or not in c program.

In this article, you will learn how to check whether an input number is a Harshad number.

Example

What are the Harshad Numbers?

• Input Number is 54
• Definition 54 / (5 + 4), then Reminder == 0
• It means 54 is a Harshad Number

• Second example:
• Input is 25
• 25 / (2 + 5), then Reminder != 0
• It means 25 is not a Harshad Number

There are 4 ways to solve this problem:

1. Using While loop
2. Using Do-while loop
3. Using For loop
4. Using Function

You should know about the following topics in C programming to understand this program:

• If-else statement
• While loop in C
• Do-while loop in C
• For loop in C
• C Functions

1 - HARSHAD Number or Not in C using While loop

// HARSHAD Number or Not in C using While loop
#include <stdio.h>

// It's the main function of the program
int main()
{
    int num, sum = 0;

    // Step-1 Take an input from the User
    printf("INPUT A NUMBER: ");
    scanf("%d", &num);

    // Step-2 Store the input value into another variable
    int original = num;

    // Step-3 Use a loop to check the Harshad number
    while (original != 0)
    {
        sum += original % 10;
        original /= 10;
    }

    // Step-4 Compare the input value with the sum of divisors of the input value
    if (num % sum == 0)
        printf("\n%d IS A HARSHAD NUMBER\n", num);
    else
        printf("\n%d IS NOT A HARSHAD NUMBER\n", num);

    return 0;
}

Run

Output

2 - HARSHAD Number or Not in C using Do-while loop

// HARSHAD Number or Not in C using Do-while loop
#include <stdio.h>

// It's the main function of the program
int main()
{
    int num, sum = 0;

    // Step-1 Take an input from the User
    printf("INPUT A NUMBER: ");
    scanf("%d", &num);

    // Step-2 Store the input value into another variable
    int original = num;

    // Step-3 Use a loop to check the Harshad number
    do
    {
        sum += original % 10;
        original /= 10;
    } while (original != 0);

    // Step-4 Compare the input value with the sum of divisors of the input value
    if (num % sum == 0)
        printf("\n%d IS A HARSHAD NUMBER\n", num);
    else
        printf("\n%d IS NOT A HARSHAD NUMBER\n", num);

    return 0;
}

Run

3 - HARSHAD Number or Not in C using For loop

// HARSHAD Number or Not in C using For loop
#include <stdio.h>

// It's the main function of the program
int main()
{
    int num, sum = 0;

    // Step-1 Take an input from the User
    printf("INPUT A NUMBER: ");
    scanf("%d", &num);

    // Step-2 Store the input value into another variable
    int original = num;

    // Step-3 Use a loop to check the Harshad number
    for (original != 0; original /= 10;)
        sum += original % 10;

    // Step-4 Compare the input value with the sum of divisors of the input value
    if (num % sum == 0)
        printf("\n%d IS A HARSHAD NUMBER\n", num);
    else
        printf("\n%d IS NOT A HARSHAD NUMBER\n", num);

    return 0;
}

Run

Output

4 - HARSHAD Number or Not in C using Function

// HARSHAD Number or Not in C using Function
#include <stdio.h>

// Function to check the Harshad number
int is_harshad_number(int number)
{
    int sum = 0;
    int original = number; // Store the input value in another variable

    while (original != 0)
    {
        sum += original % 10;
        original /= 10;
    }

    // If the condition is true It will return '1' otherwise return '0'
    return number % sum == 0;
}

// It's the main function of the program
int main()
{
    int num;

    // Step-1 Take an input from the User
    printf("INPUT A NUMBER: ");
    scanf("%d", &num);

    // Step-2 Call the is_harshad_number(); function to check the Harshad number
    if (is_harshad_number(num))
        printf("\n%d IS A HARSHAD NUMBER\n", num);
    else
        printf("\n%d IS NOT A HARSHAD NUMBER\n", num);

    return 0;
}

Run

Output