`P054.c`¶

Problem Statement

WAP to check Krishnamurty number using user defined methods/functions.

Metadata¶

Property	Detail
Author	Amit Dutta amitdutta4255@gmail.com
Date	12 Dec 2025
License	MIT License (See the LICENSE file for details)
Difficulty	Beginner (index: 2 / 10)

Concepts¶

Beta Feature

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Recursion
Iteration

Actions¶

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Source Code¶

#include <stdio.h>

int fact(int);
int isKrishnamurty(int);

int fact(int n)
{
    int fact = 1, i;
    for (i = 1; i <= n; i++)
        fact *= i;
    return fact;
}

int isKrishnamurty(int n)
{
    int temp = n, sum = 0;
    while (temp > 0)
    {
        sum += fact(temp % 10);
        temp /= 10;
    }
    return n == sum;
}

int main()
{
    int n;
    printf("Enter the number : ");
    scanf("%d", &n);
    if (isKrishnamurty(n))
        printf("\nInput %d is a Krishnamurty Number.", n);
    else
        printf("\nInput %d is not a Krishnamurty number.", n);
    return 0;
}

Explanation¶

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    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

    - Follow the exact format below. Do NOT change headings.

    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (P054.c):

    #include <stdio.h>

    int fact(int);
    int isKrishnamurty(int);

    int fact(int n)
    {
        int fact = 1, i;
        for (i = 1; i <= n; i++)
            fact *= i;
        return fact;
    }

    int isKrishnamurty(int n)
    {
        int temp = n, sum = 0;
        while (temp > 0)
        {
            sum += fact(temp % 10);
            temp /= 10;
        }
        return n == sum;
    }

    int main()
    {
        int n;
        printf("Enter the number : ");
        scanf("%d", &n);
        if (isKrishnamurty(n))
            printf("\nInput %d is a Krishnamurty Number.", n);
        else
            printf("\nInput %d is not a Krishnamurty number.", n);
        return 0;
    }

P054.c¶