using System;

public class Program

{

    public static void Main(string[] args)

    {

        int fact=1,i,number;

        Console.WriteLine("Enter Any Number");

        number=int.Parse(Console.ReadLine());

        for(i=1;i<=number;i++)

        {

            fact=fact*i;

        }

        Console.WriteLine("factorial number is"+number+"IS"+fact);

    }

}