Cartesian Coordinate System

using System;
class CartesianCoordinateSystem
{
  static void Main()
  {
    //Telerik Academy
    //You are given a two-dimensional Cartesian coordinate system and the two coordinates (X and Y) of a point in the coordinate system. As you will find, the coordinate system is divided by 2 lines (see the picture bellow) which divide the plain in four parts. Each of these parts has a lot of points that are numbered between 1 and 4. There is one point where our lines are crossing. This point has the following coordinates: X=0 and Y=0. As a result this point is numbered 0. The points on the lines are also numbered with the numbers 5 and 6 (again see the picture below).
//Your task is to write a program that finds the number of the location of the given point in the coordinate system.

    double coordinateX = double.Parse(Console.ReadLine()),
           coordinateY = double.Parse(Console.ReadLine());

    if (coordinateX == 0 && coordinateY == 0)
    {
      Console.WriteLine("0");
    }
    else if (coordinateX > 0 && coordinateY > 0)
    {
      Console.WriteLine("1");
    }
    else if (coordinateX < 0 && coordinateY > 0)
    {
      Console.WriteLine("2");
    }
    else if (coordinateX < 0 && coordinateY < 0)
    {
      Console.WriteLine("3");
    }
    else if (coordinateX > 0 && coordinateY < 0)
    {
      Console.WriteLine("4");
    }
    else if (coordinateX == 0 && coordinateY != 0)
    {
      Console.WriteLine("5");
    }
    else if (coordinateX !=0 && coordinateY == 0)
    {
      Console.WriteLine("6");
    }
  }
}