parse to number javascript code example

Example 1: Javascript string to int

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

Example 2: javascript convert a number in string

const num = 123; //> type number 123
const str = num.toString(); //> type string "123"

Example 3: javascript string to a decimal

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

Example 4: string to int javascript

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

Example 5: string to number javascript

new Number(valeur);
var a = new Number('123'); // a === 123 donnera false
var b = Number('123'); // b === 123 donnera true
a instanceof Number; // donnera true
b instanceof Number; // donnera false