Compute sum of factorial of digits Dry Run in C

Compute sum of factorial of digits is an interactive C dry run visualizer from the For programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Compute sum of factorial of digits Program Code

#include <stdio.h>
int factorial(int n) {
    int fact = 1, i;
    for(i = 1; i <= n; i++) {
        fact *= i;
    }
    return fact;
}

int main() {
    int num, sum = 0, temp;
    printf("Enter a number: ");
    scanf("%d", &num);
    
    for(temp = num; temp != 0; temp /= 10) {
        int digit = temp % 10;
        sum += factorial(digit);
    }
    
    printf("Sum of factorials of digits = %d\n", sum);
    
    if(sum == num) {
        printf("%d is a STRONG number!\n", num);
    }
    return 0;
}

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