SomeFactorials

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;

namespace SomeFactorials
{
    class SomeFactorials
    {
        static void Main()

        {
            int i, number;
            Console.WriteLine("Enter a number to find the factorials");
            number = int.Parse(Console.ReadLine());
            BigInteger fact = number;
            for (i = number - 1; i >= 1; i-- )
            {
                fact = fact * i;
            }
            Console.WriteLine("Factorial of the given number is: {0}", fact);
        }
    }
}