W3cubDocs

/JavaScript

number.valueOf

The valueOf() method returns the wrapped primitive value of a Number object.

Syntax

numObj.valueOf()

Return value

A number representing the primitive value of the specified Number object.

Description

This method is usually called internally by JavaScript and not explicitly in web code.

Examples

Using valueOf

var numObj = new Number(10);
console.log(typeof numObj); // object

var num = numObj.valueOf();
console.log(num);           // 10
console.log(typeof num);    // number

Specifications

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support Yes Yes Yes Yes Yes Yes
Feature Android webview Chrome for Android Edge mobile Firefox for Android Opera Android iOS Safari Samsung Internet
Basic support Yes Yes Yes Yes Yes Yes ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/valueOf