How to add loop statement

[Hawks]

Hi everyone,

I am in need of finishing up my problem. Before I ask my questions here is the problem:

Write a method that computes future investment value at a given interest rate for a specified number of years.
Use the following method header:



Write a test program that prompts the user to enter the investment amount (e.g., 1000) and the interest rate (e.g., 9%) and prints a table
that displays future value for the years from 1 to 30, as shown below:


I need to create a loop to show years (1-30), as I already have gotten the other codes. Here is what I have so far.

public static void main(String[] args) {
        
        // Step 0: create a Scanner for input
        Scanner input = new Scanner(System.in);
        
        // Step 1: enter investment amount
        System.out.print("Enter investment amount: ");
        double investmentAmount = input.nextDouble();
        
        // Step 2: enter annual interest rate
        System.out.println("Enter annual interest Rate, e.g. 4.25: ");
        double annualInterestRate = input.nextDouble();
                
        // Step 3: calculate monthly rate from annual interest rate
        double monthlyInterestRate = annualInterestRate / 1200 ;
                
        // Step 4: enter number of years
        System.out.print(
                "Enter number of years as an integer, for example 1: ");
        int numberofYears = input.nextInt();
        
        // Step 5: compute future value
        double futureInvestmentValue = investmentAmount * Math.pow(1 + (annualInterestRate * .01
                /12),numberofYears * 12); 
        
        // Step 6: output future value
        System.out.println("Future value with interest compunded monthly:" + "$"
                + futureInvestmentValue + ".");
        
    }
}

Thanks guys!

[DarrylBurke]

Before I ask my questions ...

Did you forget to ask your questions?

db

[Hawks]

Sorry if I was confusing. My question is how would I start/make the loop to display the 30 future value results.

[AndrewM16921]

First you'd want some method to calculate the future value for a single year. Then, you loop from 0 to 30 and call that method as needed. Something like this:

public static void main(String[] args)
{
	double[] amount = new double[30];
	double[] annual = new double[30];
	double[] monthly = new double[30];
	//fill data from input...
	
	System.out.println("Years \t\t Future Value");
	for(int i = 0; i < 30; i++)
	{
		System.out.println(i + " \t\t " + futureValue(amount[i], annual[i], monthly[i], i));
	}
}

public static double futureValue(double amount, double annual, double monthly, int years)
{
	double value = 0.0;
	// calculate future value based on data
	return value;
}

[Hawks]

Thank you!