import java.util.Scanner;
import java.text.NumberFormat;

public class FutureValueApp
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String choice = "y";
        while (!choice.equalsIgnoreCase("n"))
        {
            // get the input from the user
            System.out.print("Enter monthly investment:   ");
            double monthlyInvestment = sc.nextDouble();
            System.out.print("Enter yearly interest rate: ");
            double interestRate = sc.nextDouble();
            System.out.print("Enter number of years:      ");
            int years = sc.nextInt();

            // convert yearly to monthly values
            // and initialize future value
            double monthlyInterestRate = interestRate/12/100;
            int months = years * 12;
            double futureValue = 0.0;
            // use a for loop to calculate the future value
            for (int i = 1; i <= months; i++)
            {
                futureValue =
                    (futureValue + monthlyInvestment) *
                    (1 + monthlyInterestRate);
            }

            // format and display the result
            NumberFormat currency =
                NumberFormat.getCurrencyInstance();
            System.out.println("Future value:               "
                              + currency.format(futureValue));
            System.out.println();

            // see if the user wants to continue
            System.out.print("Continue? (y/n): ");
            choice = sc.next();
            System.out.println();
        }
    }
}