The `Number.POSITIVE_INFINITY`

property represents the positive Infinity value.

Property attributes of `Number.POSITIVE_INFINITY`
| |
---|---|

Writable | no |

Enumerable | no |

Configurable | no |

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 by`POSITIVE_INFINITY`

is`POSITIVE_INFINITY`

. - Any negative value, including
`NEGATIVE_INFINITY`

, multiplied by`POSITIVE_INFINITY`

is`NEGATIVE_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`

is`NaN`

. -
`NaN`

multiplied by`POSITIVE_INFINITY`

is`NaN`

. -
`POSITIVE_INFINITY`

, divided by any negative value except`NEGATIVE_INFINITY`

, is`NEGATIVE_INFINITY`

. -
`POSITIVE_INFINITY`

, divided by any positive value except`POSITIVE_INFINITY`

, is`POSITIVE_INFINITY`

. -
`POSITIVE_INFINITY`

, divided by either`NEGATIVE_INFINITY`

or`POSITIVE_INFINITY`

, is`NaN`

.

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.

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(); }

Specification |
---|

ECMAScript (ECMA-262) The definition of 'Number.POSITIVE_INFINITY' in that specification. |

Desktop | ||||||
---|---|---|---|---|---|---|

`POSITIVE_INFINITY` |
1 | 12 | 1 | 4 | 3 | 1 |

Mobile | ||||||
---|---|---|---|---|---|---|

`POSITIVE_INFINITY` |
1 | 18 | 4 | 10.1 | 1 | 1.0 |

Server | |
---|---|

`POSITIVE_INFINITY` |
0.1.100 |

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/POSITIVE_INFINITY