Number.prototype

The Number.prototype property represents the prototype for the Number constructor.

Description

All Number instances inherit from Number.prototype. The prototype object of the Number constructor can be modified to affect all Number instances.

Properties

Number.prototype.constructor

Returns the function that created this object's instance. By default this is the Number object.

Methods

Number.prototype.toExponential()

Returns a string representing the number in exponential notation.

Number.prototype.toFixed()

Returns a string representing the number in fixed-point notation.

Number.prototype.toLocaleString()

Returns a string with a language sensitive representation of this number. Overrides the Object.prototype.toLocaleString() method.

Number.prototype.toPrecision()

Returns a string representing the number to a specified precision in fixed-point or exponential notation.

Number.prototype.toSource()

Returns an object literal representing the specified Number object; you can use this value to create a new object. Overrides the Object.prototype.toSource() method.

Number.prototype.toString()

Returns a string representing the specified object in the specified radix (base). Overrides the Object.prototype.toString() method.

Number.prototype.valueOf()

Returns the primitive value of the specified object. Overrides the Object.prototype.valueOf() method.

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' in that specification.	Standard
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Number' in that specification.	Standard
ECMAScript 2017 Draft (ECMA-262) The definition of 'Number' in that specification.	Draft

Browser compatibility

See also

• Number