http://www.w3schools.com/jsref/jsref_tostring_number.asp toString() http://www.w3schools.com/jsref/jsref_tostring_number.asp toString() W3Schools toString toString toString() method http://www.w3schools.com/jsref/jsref_tostring_number.asp https://www.w3schools.com/jsref/jsref_tostring_number.asp