NEED HELP WITH C# PROBLEM: Redo problem 5 by adding a validation to check that t

Question

NEED HELP WITH C# PROBLEM:

Redo problem 5 by adding a validation to check that the user's input is numeric. If not, prompt the user and ask them to re-enter the value(s).

I did the code for problem 5 already, but I need help adding the validation to check for user's input being numeric part.

I attached problem 5 below to refer to.

5. Write a console program that takes the x-y coordinates of a point in the Cartesian plane (typed in by the user from the keyboard) and displays a message telling either an axis on which the point lies (if x ory are 0, or the quadrant in which it is found. Sample output: (-1.0, -2.5) is in quadrant 2 (0.0, 4.8) is on the y axis Quadrant 4 Quadrant 1 Quadrant 3 Quadrant 2

Explanation / Answer

Here is the code

using System;

public class Test
{
   public static void Main()
   {
       String s;
       double x,y;
       bool f=true;
      
      
       while(f)
       {
           Console.WriteLine("Enter x");
           s=Console.ReadLine();
           if(double.TryParse(s, out x))
           {
               Console.WriteLine("Enter y");
               s=Console.ReadLine();
               if(double.TryParse(s, out y))
               {
                   if( x > 0 && y > 0)
                   Console.WriteLine("point lies in the First quandrant ");
                   else if( x < 0 && y > 0)
                   Console.WriteLine("point lies in the Second quandrant ");
                   else if( x < 0 && y < 0)
                   Console.WriteLine("point lies in the Third quandrant ");
                   else if( x > 0 && y < 0)
                   Console.WriteLine("point lies in the Fourth quandrant ");
                   else if( x == 0 && y == 0)
                   Console.WriteLine("point lies at the origin ");
                   else if( x == 0)
                   Console.WriteLine("point lies at y axis ");
                   else if( y == 0)
                   Console.WriteLine("point lies at x axis ");
                  
                   f=false;
                  
               }
               else Console.WriteLine ("Invalid Entry for y, please Try Again");
          
          
           }
           else Console.WriteLine ("Invalid Entry for x, please Try Again");
       }
     
   }
}

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