JavaScript Number Properties

Number Properties

See Also:

Numbers Tutorial Number Methods Number Reference

JavaScript EPSILON

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

Example

let x = Number.EPSILON;

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;

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

JavaScript MIN_VALUE

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

Example

let x = Number.MIN_VALUE;

Minimum and Maximum Safe Integers

ES6 added max and min properties to the Number object:

• Number.MAX_SAFE_INTEGER
• Number.MIN_SAFE_INTEGER

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;

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;

JavaScript POSITIVE_INFINITY

Example

let x = Number.POSITIVE_INFINITY;

POSITIVE_INFINITY is returned on overflow:

let x = 1 / 0;

JavaScript NEGATIVE_INFINITY

Example

let x = Number.NEGATIVE_INFINITY;

NEGATIVE_INFINITY is returned on overflow:

let x = -1 / 0;

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;

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

let x = 100 / "Apple";

Safe integers are all integers from -(253 - 1) to +(253 - 1). This is safe: 9007199254740991. This is not safe: 9007199254740992.

Complete JavaScript Reference

For a complete reference to all JavaScript properties and methods, with full descriptions and many examples, go to:

the Full JavaScript Reference.

The reference inludes all JavaScript updates from 1999 to 2025.