Sum of first N natural numbers using function Dry Run in C

Sum of first N natural numbers using function is an interactive C dry run visualizer from the Functions 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.

Sum of first N natural numbers using function Program Code

#include <stdio.h>

int sumNatural(int n) {
    return (n * (n + 1)) / 2;   // formula
}

int main() {
    int N = 10;
    printf("Sum 1 to %d = %d\n", N, sumNatural(N));
    return 0;
}

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