PMT in Javascript

Question

I am trying to code the equivalent to the EXCEL PMT function.

in JavaScript, the formula looks like this:

function PMT (ir, np, pv, fv ) {
 /*
 ir -          


        

Answer 1

Below is the code in java:

double pmt = ((pv - fv) * ir / (1 - Math.pow((1 + ir), -np)));