js int cast code example

Example 1: javascript convert string to number or integer

//It accepts two arguments. 
//The first argument is the string to convert. 
//The second argument is called the radix. This is the base number used in mathematical systems. For our use, it should always be 10.


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


// returns 42

Example 2: javascript type casting int

Number("3.14") // returns 3.14
false.toString()   // returns "false"
String(false)      // returns "false"

Example 3: hex string to int javascript

console.log(hex.toString(16));

Example 4: 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