using System;

    public class Program

    {

      public static void Main()

        {

        Console.WriteLine("Please Enter the value of N:");

        int n=(Console.Read());

        long i, fact = 1;

        if(!(n < 0))

        {

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

            {

                fact= fact * i;

                Console.WriteLine("Factorial of N is:" + fact);

            }

        }

        else

        {

            Console.WriteLine("Factorial of Negative numbers doesn't exist.");

        }

        }

    }

​