string to number javascript 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: string to number javascript

// Method - 1 ### parseInt() ###
var text = "42px";
var integer = parseInt(text, 10);
// returns 42

// Method - 2 ### parseFloat() ###
var text = "3.14someRandomStuff";
var pointNum = parseFloat(text);
// returns 3.14

// Method - 3 ### Number() ###
Number("123"); // returns 123
Number("12.3"); // returns 12.3
Number("3.14someRandomStuff"); // returns NaN
Number("42px"); // returns NaN

Example 3: javascript string to integer

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

Example 4: tonumber javascript

number = parseInt("010");
// number = 10