Free Online C Code Explainer

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Paste your C code snippet in the input box and click the "Explain" button.
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About C

C is a general-purpose, procedural computer programming language supporting structured programming, lexical variable scope, and recursion, with a static type system.

C code examples

Hello World in C

#include <stdio.h>
int main() { printf("Hello, World!\n"); return 0; }

Fibonacci in C

#include <stdio.h>

void fibonacci(int n) {
    int a = 0, b = 1;
    for (int i = 0; i < n; i++) {
        printf("%d\n", a);
        int temp = a;
        a = b;
        b = temp + b;
    }
}

int main() {
    fibonacci(10);
    return 0;
}