using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("What would you like to calculate the factorial of?");

ulong ans= ulong.Parse(Console.ReadLine());

ulong fact= 1;

        ulong i = 1;

while(i <= ans)

{{ ulong factorial= fact * i;}

    i++;

 Console.WriteLine(" the factorial of " +ans + " is " };

    }

    }

}

​

​

​