Reading the User's Response

Here is the program with some additional work done on the "prompting and looping" aspect:

import java.util.Scanner ;

class EvalPoly
{
  public static void main (String[] args ) 
  {
   
    Scanner scan = new Scanner ( System.in );

    double x;                      // a value to use with the polynomial
    String response = "y";         // "y" or "n"

    while ( response.equals( "y" ) )    
    {
       // Get a value for x

       // Evaluate the polynomial

       // Print out the result

       // Ask the user if the program should continue.
       // The user's answer is "response".
       ;

       response = scan.;      
    }

  }
}