JavaScript Number Properties
Number Properties
|
Number.EPSILON Number.MAX_VALUE Number.MIN_VALUE |
Number.MAX_SAFE_INTEGER Number.MIN_SAFE_INTEGER Number.POSITIVE_INFINITY Number.NEGATIVE_INFINITY Number.NaN |
JavaScript EPSILON
Number.EPSILON is the difference between
the smallest floating point number greater than 1 and 1.
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.
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:
JavaScript MIN_VALUE
Number.MIN_VALUE is a constant representing the lowest possible number in JavaScript.
Minimum and Maximum Safe Integers
ES6 added max and min properties to the Number object:
Number.MAX_SAFE_INTEGERNumber.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).
JavaScript MAX_SAFE_INTEGER
Number.MAX_SAFE_INTEGER represents the maximum safe integer in JavaScript.
Number.MAX_SAFE_INTEGER is (253 - 1).
JavaScript POSITIVE_INFINITY
Example
let x = Number.POSITIVE_INFINITY;
Try
it Yourself »
POSITIVE_INFINITY is returned on overflow:
let x = 1 / 0;
Try
it Yourself »
JavaScript NEGATIVE_INFINITY
Example
let x = Number.NEGATIVE_INFINITY;
Try
it Yourself »
NEGATIVE_INFINITY is returned on overflow:
let x = -1 / 0;
Try
it Yourself »
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;
Try
it Yourself »
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:
W3Schools' Full JavaScript Reference.
The reference inludes all JavaScript updates from 1999 to 2025.
