how to convert a string into a number code example

Example 1: Javascript string to int

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

Example 2: how to get int from string java

// You will receive an error if there are non-numeric characters in the String.
String num = "5";
int i = Integer.parseInt(num);

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

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

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