Compute sum of squares: 1² + 2² + ... + n² Dry Run in C

Compute sum of squares: 1² + 2² + ... + n² 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 squares: 1² + 2² + ... + n² Program Code

#include <stdio.h>
int main() {
    int n, sum = 0, i;
    printf("Enter n: ");
    scanf("%d", &n);
    
    for(i = 1; i <= n; i++) {
        sum = sum + (i * i);
    }
    
    printf("Sum of squares = %d\n", sum);
    printf("Formula: n(n+1)(2n+1)/6 = %d\n", n*(n+1)*(2*n+1)/6);
    return 0;
}

View the complete For programs page.