ABUNDANT Number or Not in C Program

Abundant number or not in c program.

In this article, you will learn to check whether an input number is an Abundant number.

Example

What is an Abundant Numbers?

• Input Number is 12
• Properly Divisors of 12 are 1, 2, 3, 4, 6
• The sum of properly divisors 1 + 2 + 3 + 4 + 6 = 16
• Now compare the sum of proper divisors & input number
• Here is the sum of proper divisors 16 > 12
• It means 12 is an abundant 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 - ABUNDANT Number or Not in C using While loop

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

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

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

    // Step-2 Calculate the sum of divisors of the input number
    int i = 1;
    while (i < number)
    {
        if (number % i == 0)
            sum += i;
        i++;
    }

    // Step-3 Compare the input number with the sum of its divisors
    if (sum > number)
    {
        printf("\n%d IS AN ABUNDANT NUMBER", number);
        printf("\nABUNDANCE = %d\n", sum - number);
    }
    else
        printf("\n%d IS NOT AN ABUNDANT NUMBER!\n", number);

    return 0;
}

Run

Output

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

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

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

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

    // Step-2 Calculate the sum of divisors of the input number
    int i = 1;
    do
    {
        if (number % i == 0)
            sum += i;
        i++;
    } while (i < number);

    // Step-3 Compare the input number with the sum of its divisors
    if (sum > number)
    {
        printf("\n%d IS AN ABUNDANT NUMBER", number);
        printf("\nABUNDANCE = %d\n", sum - number);
    }
    else
        printf("\n%d IS NOT AN ABUNDANT NUMBER!\n", number);

    return 0;
}

Run

3 - ABUNDANT Number or Not in C using For loop

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

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

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

    // Step-2 Calculate the sum of divisors of the input number
    for (int i = 1; i < number; i++)
    {
        if (number % i == 0)
            sum += i;
    }

    // Step-3 Compare the input number with the sum of its divisors
    if (sum > number)
    {
        printf("\n%d IS AN ABUNDANT NUMBER", number);
        printf("\nABUNDANCE = %d\n", sum - number);
    }
    else
        printf("\n%d IS NOT AN ABUNDANT NUMBER!\n", number);

    return 0;
}

Run

Output

4 - ABUNDANT Number or Not in C using Function

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

void is_abundant_number(int number)
{
    int sum = 0, i = 1;

    // Calculate the sum of divisors of the input number
    while (i < number)
    {
        if (number % i == 0)
            sum += i;
        i++;
    }

    // Compare the input number with the sum of its divisors
    if (sum > number)
    {
        printf("\n%d IS AN ABUNDANT NUMBER", number);
        printf("\nABUNDANCE = %d\n", sum - number);
    }
    else
        printf("\n%d IS NOT AN ABUNDANT NUMBER!\n", number);
}

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

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

    // Step-2 Call the is_abundant_number(); function check input number is ABUNDANT or Not
    is_abundant_number(number);

    return 0;
}

Run

Output