# My Mortgage Calculator Project - Version 1

``````package com.mortcalc;

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

public class Main {

public static void main(String[] args) {

/*
mathematical formula to calculate mortgage

M = [P × {r(1 + r)^n}/{(1 + r)^n - 1}]

M = Mortgage
P = Principal Amount
r = Monthly Interest Rate
n = Number of Monthly Payments [Periods (Months)]
*/

// declaration of constant values
final byte PERCENT = 100;
final byte MONTHS_IN_YEAR = 12;

Scanner userInput = new Scanner(System.in); // declaring scanner object to accept user input

// asking for user input and giving back appropriate values
System.out.print("Principal Amount: ");
int principal = userInput.nextInt();

System.out.print("Annual Interest Rate: ");
float monthlyInterestRate = ((userInput.nextFloat() / PERCENT) / MONTHS_IN_YEAR);
System.out.println("Monthly Interest Rate: " + monthlyInterestRate);

System.out.print("Period (Years): ");
short period= (short) (userInput.nextShort() * MONTHS_IN_YEAR); // stores 'period' in months
System.out.println("Period (Months): " + period);

userInput.close(); // closing the scanner object

// formula for calculating mortgage implemented in java
double mortgage = (principal * (monthlyInterestRate * (Math.pow(1 + monthlyInterestRate, period)))
/ ((Math.pow(1 + monthlyInterestRate, period)) - 1));

// prints the properly formatted mortgage value in local currency
System.out.println("Mortgage: " + NumberFormat.getCurrencyInstance().format(mortgage));

}
}

``````

what is your question?

I don’t have any questions. I was just sharing my take of the project with the community Hello
The flouting numbers doesn’t work with my IntelliJ editor

Hello @Mnoo!
After taking a look at your screenshot, I think it’s because you’re separating the decimal value from the integral value (of annual interest rate) using a ‘comma’ instead of a ‘decimal’.

How you’ve written it - 3,92
How it should be written - 3.92

I hope that solves your issue. Cheers.

Actually I even tried (.)
but it doesn’t work either

that is great… keep going, bro.
.

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You did a very nice job. Great! I would definitely not be able to do something like this.

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