Scanner input = new Scanner(System.in);
        double volume;
        double radius;
        double height;
        double cost;
        boolean done = false;
        while(!done){
            System.out.println("Input the Volume");
            volume = input.nextDouble();
            System.out.println("Input the radius");
            radius = input.nextDouble();
            height = volume / (Math.PI*radius*radius);
            cost = 2*Math.PI*radius(radius + height);
        }