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Number.prototype

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

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support Yes Yes 1 Yes Yes Yes
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support Yes Yes Yes 4 Yes Yes Yes
Server
Node.js
Basic support 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/prototype