/* This is the eleventh lab of Lab EE107
The purpose of this lab for a recursive function to calculate the
factorial of a positive integer.

Creating the code and free of syntax and grammatical errors.
Author: Ekwegbalum Unachukwu
Star ID:do2170dt
Date: April 9th, 2024.
*/
#include <stdio.h>

// Recursive function to calculate the factorial of a positive integer
unsigned long long factorial(unsigned int n) {
    // Base case: factorial of 0 is 1
    if (n == 0) {
        return 1;
    }
    // Recursive case: n! = n * (n-1)!
    else {
        return n * factorial(n - 1);
    }
}

int main() {
    // Test the factorial function
    unsigned int n = 5;
    printf("Factorial of %u is %llu\n", n, factorial(n));

    return 0;
}