NOMINAL

NOMINAL.js

// Copyright (c) 2012 Sutoiku, Inc. (MIT License)

function NOMINAL(rate, periods) {
  // Return error if any of the parameters is not a number
  if (isNaN(rate) || isNaN(periods)) return '#VALUE!';

  // Return error if rate <=0 or periods < 1
  if (rate <=0 || periods < 1) return '#NUM!';

  // Truncate periods if it is not an integer
  periods = parseInt(periods, 10);
  
  // Return nominal annual interest rate
  return (Math.pow(rate + 1, 1 / periods) - 1) * periods;
}