Define a method to find factorial of a Given Number.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace factoriald
{
    class Program
    {
        public static void Fact(int num)
        {
            int i, factorial = 1;
            
                for (i = 1; i <= num; i++)
                {
                    factorial = factorial * i;
                }
                Console.WriteLine("FACTORIAL= " + factorial);
        }
        static void Main(string[] args)
        {
            int num;
            Console.WriteLine("ENTER THE NUMBER");
            num = int.Parse(Console.ReadLine());
            if (num < 0)
                Console.WriteLine("Factorial not possible");
            else if (num == 0)
                Console.WriteLine("Factorial is 1");  
            else
               Fact(num);            
        }
    }
}

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