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

Property attributes of Number.prototype
Writable no
Enumerable no
Configurable no

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 Latest Draft (ECMA-262)
The definition of 'Number' in that specification.
Draft  

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Basic supportChrome Full support YesEdge Full support YesFirefox Full support 1IE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yesnodejs Full support Yes

Legend

Full support  
Full support

See also

Document Tags and Contributors

Last updated by: fscholz,