Count numbers divisible by sum of digits (for loop) Dry Run in C

Count numbers divisible by sum of digits (for loop) is an interactive C dry run visualizer from the Nested 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.

Count numbers divisible by sum of digits (for loop) Program Code

#include <stdio.h>
int sumOfDigits(int n) {
    int sum = 0;
    while(n != 0) {
        sum += n % 10;
        n /= 10;
    }
    return sum;
}

int main() {
    int start, end, num;
    printf("Enter range (start end): ");
    scanf("%d %d", &start, &end);
    
    printf("\nHarshad (Niven) numbers between %d and %d:\n", start, end);
    int count = 0;
    
    for(num = start; num <= end; num++) {
        int digitSum = sumOfDigits(num);
        if(digitSum > 0 && num % digitSum == 0) {
            printf("%d ", num);
            count++;
        }
    }
    
    printf("\n\nTotal Harshad numbers found: %d\n", count);
    return 0;
}

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