factorial.cairo

fn main() {
    println!("{}", factorial(4));
}

// Using Recursion
// fn factorial(n: usize) -> usize {
//     if( n == 0) {
//         return 1;
//     } else {
//         return factorial(n-1) * n;
//     }
// }

// Using Loop
fn factorial(n: usize) -> usize {
    let mut result: usize = 1;

    let mut i = 1;

    while i <= n {
        result *= i;

        i+=1;
    };

    result
}