a function that takes an integer in input and outputs a string with currency format. Ex. 123456 -> "123,456"

toCurrency.js

//my solution using REGEX
function toCurrency(price){
  return price.toString().replace(/(\d)(?=(\d{3})+(?!\d))/g, "$1,");
}

//good example
function toCurrency(price){
return price.toString().replace(/(\d)(?=(\d{3})+$)/g, '$1,');
}