Thread: [Solved] Problem with Area Calculator Code!

Hi there.

I am beginning to learn Java and have decided to create an area calculator. But I am having a big problem.

import java.util.Scanner;
import static java.lang.System.out;
import java.lang.Math;
 
public class AreaCalculator 
{
	public static void main(String[] args) 
	{
		Scanner keyboard = new Scanner(System.in);
		String shape;
		double width, height, radius, base, area;
		boolean wantToExit = false, exit = false;
 
		out.println("Welcome to the Area Calculator!");
		out.println("Please enter all data without a measurement!\n");
 
		while(exit == false)
		{
			out.print("Please enter the shape: ");
			shape = keyboard.nextLine();
 
			if(shape.equals("square") || shape.equals("rectangle"))
			{
				out.print("Please enter the width: ");
				width = keyboard.nextDouble();
				out.print("Please enter the height: ");
				height = keyboard.nextDouble();
 
				area = width * height;		
				out.println("\nThe area is: " + area);
			}
			else if(shape.equals("triangle"))
			{
				out.print("Please enter the base size: ");
				base = keyboard.nextDouble();
				out.print("Please enter the height: ");
				height = keyboard.nextDouble();
 
				area = (base / 2) * height;
				out.println("\nThe area is: " + area);
			}
			else if(shape.equals("circle"))
			{
				out.print("Please enter the radius (half of diameter): ");
				radius = keyboard.nextDouble();
 
				area = Math.PI * Math.sqrt(radius);
				out.println("\nThe area is: " + area);
			}
			else
			{
				out.println("Sorry, we do not currently support that shape!");
			}
 
			out.print("Do you want to exit: (true/false) ");
			wantToExit = keyboard.nextBoolean();
 
			if(wantToExit == true)
			{
				out.print("\nOkay, goodbye!");
				exit = true;
			}
			else
			{
				exit = false;
			}
		}
 
		keyboard.close();
	}
}

When I run this and choose true to exit the loop. The message "Sorry, we do not currently support that shape!" appears.

Why is this and how can I fix this?

Regards, Bradley.

Generally I would not advise using Boolean types as input variables.
They should be used for comparisons. To answer your question, change
the type that reads the exit command to a String perhaps? Then ensure the
text entered matches the command to exit the loop.

Wishes Ada xx