The Number.EPSILON property represents the difference between 1 and the smallest floating point number greater than 1.
You do not have to create a Number object to access this static property (use Number.EPSILON).
Number.EPSILON
Try it
Property attributes of Number.EPSILON |
|
|---|---|
| Writable | no |
| Enumerable | no |
| Configurable | no |
Description
The EPSILON property has a value of approximately 2.2204460492503130808472633361816E-16, or 2^-52.
Examples
Testing equality
x = 0.2; y = 0.3; z = 0.1; equal = (Math.abs(x - y + z) < Number.EPSILON);
Polyfill
if (Number.EPSILON === undefined) { Number.EPSILON = Math.pow(2, -52); }
Specifications
| Specification |
|---|
| ECMAScript Language Specification # sec-number.epsilon |
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
EPSILON |
34
|
12
|
25
|
No
|
21
|
9
|
≤37
|
34
|
25
|
21
|
9
|
2.0
|
1.0
|
0.12.0
|
See also
- Polyfill of
Number.EPSILONincore-js - The
Numberobject it belongs to
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
