How to change string to numbers

Question

How to change string to number in javascript

Answer 1

Do a conversion with parseInt(), or parseFloat(), or Number()
ex.
var text = '3.14someRandomStuff';
var pointNum = parseFloat(text); //or
var pointNum = parseInt(text); //or
var pointNum = Numbet(text);
// returns 3.14
// returns 3
// returns 3.14

Answer 2

One of the ways was to use Number() and check the validity by using isNaN() - which returns false when conversion result is good.