How to find the factorial of a number in C?

#include <stdio.h>

int main(void) {
    int n = 5;
    unsigned long long fact = 1;

    for (int i = 2; i <= n; i++) {
        fact *= i;
    }
    printf("%d! = %llu\n", n, fact);
    return 0;
}

Output:

Factorial grows very fast. Even unsigned long long overflows after 20!. The recursive way is in C Recursion.

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