我怎样才能保持100！在任何变量？

Question

*我被卡在投影机的＃20中。 看来我很熟悉找到阶乘值，但我无法获得100阶乘值。 *

Answer 1

正如Jon Skeet所说，您应该使用BigInteger。

//Add reference of System.Numerics.dll 

using System.Numerics; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      BigInteger factorial = 1; 
      var factorialOfNumber = 100; 
      for (var i = 1; i <= factorialOfNumber; i++) 
      { 
       factorial *= i; 
      } 
      Console.WriteLine("Required factorial of {0} is {1}", factorialOfNumber, factorial); 
     } 
    } 
}