Question

Write a Java Program(DoublePenny.java) that calculates the amount after a penny has been doubled every day for a 30-day month. Use a while loop to carry out the calculation. Display the amount. Sample output below if the statement was something like

System.out.println(“After day “ + day + “ you have “ + money);

After day 2 you have 0.02

After day 3 you have 0.04

After day 4 you have 0.08 ……………

After day 30 you have 5368709.12

Answer 1

public class DoublePenny {

    public static void main(String[] args) {
        int day = 1;
        double money = 0.01;
        while (day <= 30) {
            System.out.println("After day " + day + " you have " + money);
            day++;
            money *= 2;
        }
    }
}