Counting Number of Words in a String - C# Program

Anyone can suggest me the output of the following program.

using System;  

class CountWords

{

public static void Main()

{

string s = ""; // Declare 's' of string type  

Console.Write("Enter the string : ");    

S = Console.ReadLine(); // Read string from the console & save in 's'    

string [] words = s.Split(null);

// 'words' is an array of string type

// string 's' will split when a space (null) is encountered

// This will be saved into array words     

int i = words.Length; // Just count the lenght of array 'words'  

Console.WriteLine("The total number of words in the entered string : "+i);    

Console.ReadLine();

}

}