using System;

​

public class Program

{

    public static void Main()

    {

        Console.Write("Please enter your number for calculating factorial : ");

        int enterNum = Convert.ToInt32(Console.ReadLine());

        for(int i=enterNum-1; i>0; i--)

        {

            enterNum = enterNum * i;

        }

        Console.WriteLine("Factorial of given number is " + enterNum);

    }

}