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
).
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
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
Browser compatibility
BCD tables only load in the browser
See also
- The
Number
object it belongs to