using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks; 

​

namespace eLMSActivity3

{

    public class Program

    {

        static int Fact(int num) {

            if (num == 1)

                return 1;

            else return num * Fact(num - 1);

        }

        public static void Main(string[] args)

        {

            Console.WriteLine(Fact(10));

        }

    }

}