Answer Happy

Code example 5-1import java.util.Scanner;import java.text.NumberFormat;public class WeightConverter { public static void main(String[] args) { Scanner sc = newScanner(System.in); String prompt = "Enterweight in lbs: "; boolean isValid =false; double weightInPounds =0.0; while (!isValid) { weightInPounds = getDouble(sc, prompt); if (weightInPounds > 0) { isValid = true; } else { System.out.println("Weight must be greater than 0."); } } double weightInKilos =weightInPounds / 2.2; NumberFormat nf =NumberFormat.getNumberInstance(); nf.setMaximumFractionDigits(2); String message =weightInPounds + " lbs\nequals\n" + nf.format(weightInKilos) + " kgs\n"; System.out.print(message); } public static double getDouble(Scanner sc,String prompt) { double d = 0.0; boolean isValid =false; while (!isValid) { System.out.print(prompt); if (sc.hasNextDouble()) { d = sc.nextDouble(); isValid = true; } else { System.out.println ("Error! Invalid decimal value. Try again."); } sc.nextLine(); } return d; }}
(Refer to code example 5-1.) If the user enters -1 at the firstconsole prompt, what does the code do?
Question 12 options:
figures the weight in kilograms
catches an exception
displays an error message from the getDouble() method
displays an error message from the main() method