The Number.POSITIVE_INFINITY
property represents the positive Infinity value.
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Property attributes of Number.POSITIVE_INFINITY |
|
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Description
The value of Number.POSITIVE_INFINITY
is the same as the value of the global object's Infinity
property.
This value behaves slightly differently than mathematical infinity:
- Any positive value, including
POSITIVE_INFINITY
, multiplied byPOSITIVE_INFINITY
isPOSITIVE_INFINITY
. - Any negative value, including
NEGATIVE_INFINITY
, multiplied byPOSITIVE_INFINITY
isNEGATIVE_INFINITY
. - Any positive number divided by
POSITIVE_INFINITY
is positive Zero. - Any negative number divided by
POSITIVE_INFINITY
is negative Zero. - Zero multiplied by
POSITIVE_INFINITY
isNaN
. NaN
multiplied byPOSITIVE_INFINITY
isNaN
.POSITIVE_INFINITY
, divided by any negative value exceptNEGATIVE_INFINITY
, isNEGATIVE_INFINITY
.POSITIVE_INFINITY
, divided by any positive value exceptPOSITIVE_INFINITY
, isPOSITIVE_INFINITY
.POSITIVE_INFINITY
, divided by eitherNEGATIVE_INFINITY
orPOSITIVE_INFINITY
, isNaN
.
You might use the Number.POSITIVE_INFINITY
property to indicate an error condition that returns a finite number in case of success. Note, however, that isFinite
would be more appropriate in such a case.
Because POSITIVE_INFINITY
is a static property of Number
, you always use it as Number.POSITIVE_INFINITY
, rather than as a property of a Number
object you created.
Examples
Using POSITIVE_INFINITY
In the following example, the variable bigNumber
is assigned a value that is larger than the maximum value. When the if
statement executes, bigNumber
has the value Infinity
, so bigNumber
is set to a more manageable value before continuing.
var bigNumber = Number.MAX_VALUE * 2; if (bigNumber == Number.POSITIVE_INFINITY) { bigNumber = returnFinite(); }
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Number.POSITIVE_INFINITY' in that specification. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
POSITIVE_INFINITY | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 4 | Opera Full support 3 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.1.100 |
Legend
- Full support
- Full support