using System;

namespace test
{
  public class Fibonacci
  {
    public static void Main()
    {
      long v1, v2, v3;

      v1 = 0; //1st number
      v2 = 1; //2nd number
      Console.WriteLine("The Fibonacci series are: ");
      Console.Write("{0}, {1}", v1, v2);

      for(int i= 3; i <= 50; i++)
      {
        v3 = v1 + v2; //Each number is the sum of the two previous numbers
        Console.Write(", {0}", v3);
        
        //Update the variables for the two previous numbers
        v1 = v2; 
        v2 = v3;        
      }
      Console.WriteLine("\n\n");
    }
    
  }
}