Calculate the factorial through Recursive call

Calculate the factorial through Recursive call

using System;

namespace ConsoleApplicationSample

{

    class ArrayBCA

    {

#region Recursion

        // So we will calculate the factorial like this.

        //4!=4x(4-1)x(4-2)x(4-3)=24

        //In other words, the Factorial method will call itself by the following code.

        static void Main(string[] args)

        {

            Console.WriteLine("Please Enter a Number...>");

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

            double factorial = Factorial(number);

            Console.WriteLine("factorial of= " + number + "=" + factorial.ToString());

            Console.ReadKey();

        }

        public static double Factorial(int number)

        {

            if (number == 0)

                return 1;

            return number * Factorial(number - 1);//Recursive call   

        }

        #endregion

    }

}

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