目录

JavaScript Number Properties

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Property	Description
EPSILON	The difference between 1 and the smallest number > 1.
MAX_VALUE	The largest number possible in JavaScript
MIN_VALUE	The smallest number possible in JavaScript
MAX_SAFE_INTEGER	The maximum safe integer (2⁵³ - 1)
MIN_SAFE_INTEGER	The minimum safe integer -(2⁵³ - 1)
POSITIVE_INFINITY	Infinity (returned on overflow)
NEGATIVE_INFINITY	Negative infinity (returned on overflow)
NaN	A "Not-a-Number" value

JavaScript EPSILON

Number.EPSILON is the difference between the smallest floating point number greater than 1 and 1.

Example

let x = Number.EPSILON;

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Note

Number.EPSILON is an ES6 feature.

It does not work in Internet Explorer.

JavaScript MAX_VALUE

Number.MAX_VALUE is a constant representing the largest possible number in JavaScript.

Example

let x = Number.MAX_VALUE;

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Number Properties Cannot be Used on Variables

Number properties belong to the JavaScript Number Object.

These properties can only be accessed as Number.MAX_VALUE.

Using x.MAX_VALUE, where x is a variable or a value, will return undefined:

Example

let x = 6;
x.MAX_VALUE

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JavaScript MIN_VALUE

Number.MIN_VALUE is a constant representing the lowest possible number in JavaScript.

Example

let x = Number.MIN_VALUE;

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JavaScript MAX_SAFE_INTEGER

Number.MAX_SAFE_INTEGER represents the maximum safe integer in JavaScript.

Number.MAX_SAFE_INTEGER is (2⁵³ - 1).

Example

let x = Number.MAX_SAFE_INTEGER;

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JavaScript MIN_SAFE_INTEGER

Number.MIN_SAFE_INTEGER represents the minimum safe integer in JavaScript.

Number.MIN_SAFE_INTEGER is -(2⁵³ - 1).

Example

let x = Number.MIN_SAFE_INTEGER;

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Note

MAX_SAFE_INTEGER and MIN_SAFE_INTEGER are ES6 features.

They do not work in Internet Explorer.

JavaScript POSITIVE_INFINITY

Example

let x = Number.POSITIVE_INFINITY;

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POSITIVE_INFINITY is returned on overflow:

let x = 1 / 0;

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JavaScript NEGATIVE_INFINITY

Example

let x = Number.NEGATIVE_INFINITY;

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NEGATIVE_INFINITY is returned on overflow:

let x = -1 / 0;

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JavaScript NaN - Not a Number

NaN is a JavaScript reserved word for a number that is not a legal number.

Examples

let x = Number.NaN;

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Trying to do arithmetic with a non-numeric string will result in NaN (Not a Number):

let x = 100 / "Apple";

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Complete JavaScript Number Reference

For a complete Number reference, visit our:

Complete JavaScript Number Reference.

The reference contains descriptions and examples of all Number properties and methods.

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