js cast string to number code example

Example 1: how to convert string to int js

let string = "1";
let num = parseInt(string);
//num will equal 1 as a int

Example 2: javascript convert string to number

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

Example 3: string to int javascript

var text = '3.14someRandomStuff';
var pointNum = parseFloat(text);
// returns 3.14

Example 4: 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