Convert Roman Numerals to Arabic Numbers - Javascript

convert-to-arabic.js

/*!

Source code to convert Roman numerals to Arabic numbers.
I hope it help someone!

2014-03-07

*/
  
var i = 0;
var chars = {
  'I': 1,
  'V': 5,
  'X': 10,
  'L': 50,
  'C': 100,
  'D': 500,
  'M': 1000
};

function convert(rom) {
  var arabic = 0;

  for (i = 0; i < rom.length; i++) {
    var currentChar = rom[i],
        nextChar = rom[i + 1];

    if (chars[currentChar] < chars[nextChar]) {
      arabic -= chars[currentChar];
    } else {
      arabic += chars[currentChar];  
    }
  }

  console.log(arabic);
}

convert('MDXXIV');