Chapter 2 Question 2.4, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

Convert pounds into kilograms) Write a program that converts pounds into kilograms. The program prompts the user to enter a number in pounds, converts it to kilograms, and displays the result. One pound is 0.454 kilograms.

Solution

import java.util.Scanner;

public class HelloWorld

{

    public static void main(String[] args)

    {

        Scanner input = new Scanner(System.in);     // Create new Scanner object

        final double KILOGRAMS_PER_POUND = 0.454;   // Create constant value

        // Prompt user to enter the number of pounds

        System.out.print("Enter a number in pounds: ");

        double pounds = input.nextDouble();

        // Convert pounds into kilograms

        double kilograms = pounds * KILOGRAMS_PER_POUND;

        // Display the results

        System.out.println(pounds + " pounds is " + kilograms + " kilograms");

    }

}

OUTPUT

Enter a number in pounds: 12

12.0 pounds is 5.448 kilograms