//Character class static "toUpperCase" method ("toLowerCase")
import java.util.Scanner;
import java.text.DecimalFormat;

public class eg21_CircleArea
{
	public static void main(String[] args)
	{
		double radius;
		double area;
		String input;
		char choice;
		
		//create scanner object to read keyboard input
		Scanner keyboard = new Scanner(System.in);
		
		//create a DecimalFormat object
		DecimalFormat fmt = new DecimalFormat("0.00");
		
		do
		{
			//guess what, I skip this... not really important for toUpperCase method
			System.out.print("Do you want to do this again? (Y or N) ");
			input = keyboard.nextLine();
			choice = input.charAt(0);
		} while (Character.toUpperCase(choice) == 'Y');
	}
}