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

Specification	Status	Comment
ECMAScript 1st Edition (ECMA-262)	Standard	Initial definition. Implemented in JavaScript 1.1.
ECMAScript 5.1 (ECMA-262) The definition of 'Number.prototype.valueOf' in that specification.	Standard
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Number.prototype.valueOf' in that specification.	Standard
ECMAScript 2017 Draft (ECMA-262) The definition of 'Number.prototype.valueOf' in that specification.	Draft

Browser compatibility

See also

• Number.prototype.toSource()