Mortgage Payment Calculator Project

Make a web app that has input fields for a mortgage loan amount, interest rate, and number of payments, and uses those values to calculate the monthly loan payment.

Use the following formula:

P * r (1 + r)^n P = Principal Loan amount ($) ------------------- r = Monthly Interest Rate (decimal) (1 + r)^n - 1 n = Number of Payments (months)
Demo

Requirements

  • Have a "Calculate" button, which will show the answer on the page when clicked.
  • Have it display the answer with no more than 2 decimals.
  • Be sure to convert the values to floats after you extract them from page input fields.

Hints

Code for displaying a number to 2 decimals

Specify precision within the parenthesis of the toFixed() function

var answer = ... console.log(answer.toFixed(2))
Code for extracting values and converting them to floats
var value = parseFloat( document.getElementById("myInput").value );