Compute digital root using repeated summation (loop method) Dry Run in C

Compute digital root using repeated summation (loop method) 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 digital root using repeated summation (loop method) Program Code

#include <stdio.h>
int main() {
    int num, pass, temp;
    printf("Enter a number: ");
    scanf("%d", &num);
    
    int digitalRoot = num;
    for(pass = 1; digitalRoot >= 10; pass++) {
        int sum = 0;
        for(temp = digitalRoot; temp != 0; temp /= 10) {
            sum += temp % 10;
        }
        digitalRoot = sum;
    }
    
    printf("Digital root of %d = %d\n", num, digitalRoot);
    return 0;
}

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