C Exercises: Check whether a number is Disarium or not

Last update on August 05 2025 12:55:11 (UTC/GMT +8 hours)

15. Disarium Number Check Variants

Write a program in C to check whether a number is Disarium or not.

Test Data
Input a number: 135

Sample Solution:

C Code:

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <stdbool.h>

// Function to count the number of digits in a given number
int DigiCount(int n)
{
    int ctr_digi = 0; // Counter to store the number of digits
    int tmpx = n; // Temporary variable to store the number
    // Count the number of digits
    while (tmpx)
    {
        tmpx = tmpx / 10; // Remove the rightmost digit
        ctr_digi++; // Increment the digit count
    }
    return ctr_digi; // Return the count of digits
}

// Function to check if a number is a Disarium Number
bool chkDisarum(int n)
{
    int ctr_digi = DigiCount(n); // Get the count of digits in the number
    int s = 0; // Variable to store the sum of powers of digits
    int x = n; // Temporary variable to store the number
    int pr; // Variable to store the current digit
    // Calculate the sum of powers of digits
    while (x)
    {
        pr = x % 10; // Extract the rightmost digit
        s = s + pow(pr, ctr_digi--); // Add the power of the digit to the sum
        x = x / 10; // Remove the rightmost digit
    }
    return (s == n); // Return true if the sum equals the original number
}

// Main function
int main()
{
    int dino; // Variable to store the input number
    printf("\n\n Check whether a number is a Disarium Number or not: \n"); // Print message to prompt the user
    printf(" ------------------------------------------------------\n"); // Print separator
    printf(" Input a number: "); // Prompt the user to input a number
    scanf("%d", &dino); // Input a number

    if (chkDisarum(dino)) // Check if the input number is a Disarium Number
        printf(" The given number is a Disarium Number.\n"); // Print message if the number is a Disarium Number
    else
        printf(" The given number is not a Disarium Number.\n"); // Print message if the number is not a Disarium Number

    return 0; // Return 0 to indicate successful execution
}

Sample Output:

 Input a number: 135                                                                                          
 The given number is a Disarium Number.

Visual Presentation:

C programming: Check whether a number is Disarium or not.

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to check if a number is disarium by summing its digits raised to consecutive powers.
Write a C program to verify disarium numbers using digit extraction and power functions.
Write a C program to list disarium numbers in a specified range with detailed digit breakdowns.
Write a C program to determine the disarium property for numbers with different digit counts.

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