value type and reference type

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Source:-

using System;
 
namespace venky
{
  class Program
   {
     public static void value(int num)
      {
        num++;
      }
     public static void reference(ref int num)
      {
        num++;
      }
 
     static void Main(string[] args)
      {
        int num;
        Console.Write("Enter a number:\t");
        num = Convert.ToInt32(Console.ReadLine());
        Console.WriteLine("\n\n\tValue Type");
        Console.WriteLine("----------------");
        Console.Write("\nPrevious Value:\t{0}", num);
        Program.value(num);
        Console.Write("\nCurrent Value:\t{0}", num);
           
        Console.WriteLine("\n\n\n----------------");
        Console.WriteLine("\tReference Type");
        Console.WriteLine("--------------------");
        Console.Write("\nPrevious Value:\t{0}", num);
        Program.reference(ref num);
        Console.Write("\nCurrent Value:\t{0}", num);
        Console.ReadLine();
      }
   }
}

Output:-

Enter a number: 9                                                  Value Type                                     ---------------------------------                                             Previous Value: 9                                             Current Value: 9                                 ---------------------------------                                               Reference Type                                 ---------------------------------                                                Previous Value: 9                                                 Current Value: 10

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