Chapter 2 Exercise 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.

import java.util.Scanner;
public class Exercise_04 {

    public static void main(String[] Strings) {

        Scanner input = new Scanner(System.in);
        System.out.print("Enter a number in pounds: ");

        double pounds = input.nextDouble();
        double kilograms = pounds * 0.454;

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