Check whether a number is automorphic Dry Run in C

Check whether a number is automorphic 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.

Check whether a number is automorphic Program Code

#include <stdio.h>
int main() {
    int num, square, digits = 0, divisor = 1, temp, i;
    printf("Enter a number: ");
    scanf("%d", &num);
    
    // Count digits of original number
    for(temp = num; temp != 0; temp /= 10) {
        digits++;
    }
    
    // Calculate divisor = 10^digits
    for(i = 1; i <= digits; i++) {
        divisor *= 10;
    }
    
    square = num * num;
    
    if(square % divisor == num) {
        printf("%d is an automorphic number\n", num);
    } else {
        printf("%d is NOT an automorphic number\n", num);
    }
    return 0;
}

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