#!/usr/bin/env catnip
# Calcul de factorielle

factorielle = (n) => {
    match n {
        0 | 1 => { 1 }
        n => {
            fold(range(2, n + 1), 1, (acc, i) => { acc * i })
        }
    }
}

print("10! =", factorielle(10))  # → 10! = 3628800