how to unstringify a number in javascript code example

Example 1: tostring js

var num = 15;
var n = num.toString(); /* now */ "15"

Example 2: string to int javascript

// Convert strings
Number('123'); // returns 123
Number('12.3'); // returns 12.3
Number('3.14someRandomStuff'); // returns NaN
Number('42px'); // returns NaN