Recursion

using System;

namespace factoriel
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine(factoriel(10));
        }
        static int factoriel(int n)
        {
            if(n == 2)
            {
                return 2;
            }
                return factoriel(n - 1) * n;

        }
    }
}