T.9.10.nFactorialMethod

using System;
using System.Numerics;

class NfactorialMethod
{
    static BigInteger Factorial(int n)
    {
        BigInteger nFactorial = 1;

        for (int i = 1; i <= n; i++)
        {
            nFactorial*=i;
        }
        return nFactorial;
    }

    static void Main()
    {
        int n=100;
// ********************  The rezult of 100!  *********************************
        BigInteger nf = Factorial(n);

        Console.WriteLine("{0}! = {1:N}", n, nf);
    }
}


/*   static int NfactTrailZeros(int n)
    {
        int primeDiv5 = 5;
        int maxDivider = 5;
        int count = 0;
        while (maxDivider <= n)
        {
            count += n / maxDivider;
            maxDivider *= primeDiv5;
        }
        return count;
    }
  */