#!/usr/bin/env python

"""Calcule la factorielle d'un entier N positif"""


def main() -> None:
    print(Factorielle(5))


def Factorielle(N : int) -> int:
    if N == 1:
        return 1
    else:
        return N * Factorielle(N - 1)


if __name__ == "__main__":
    main()