javascript string to integer

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

<script language="JavaScript" type="text/javascript"> 
var a = "3.3445";
var c = parseInt(a);
alert(c);
</script>

var text = '42px';
var integer = parseInt(text, 10);
// returns 42
let myNumber = Number("5.25"); //5.25

var text = '42px';
var integer = parseInt(text, 10);
// returns 42

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

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