Math and numbersBaseline · Widely available
The number type (and Number object) represents floating-point numbers, such as 42 or -4.201, while the Math API contains mathematical functions and constants. JavaScript can also represent boundless negative and positive values as Infinity or not-a-number as NaN (as in 0 * Infinity).
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1+Supportedsince Dec 11, 2008
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1+Supportedsince Nov 9, 2004
Current: 157Safari
1+Supportedsince Jun 23, 2003
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1+Supportedsince Jun 29, 2007
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: Infinity.
Feature detection
JS · check before using
if (typeof Number !== "undefined") {
// Number is available
}Specification
Sub-features
Support for each part of the feature (74). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| Infinity | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.E | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.LN10 | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.LN2 | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.LOG10E | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.LOG2E | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.PI | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.SQRT1_2 | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.SQRT2 | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.abs | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.acos | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.acosh | 38 | 12 | 25 | 8 | 38 | 25 | 8 |
| Math.asin | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.asinh | 38 | 12 | 25 | 8 | 38 | 25 | 8 |
| Math.atan | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.atan2 | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| Math.atanh | 38 | 12 | 25 | 8 | 38 | 25 | 8 |
| Math.cbrt | 38 | 12 | 25 | 8 | 38 | 25 | 8 |
| Math.ceil | 1 | 12 | 1 | 1 | 18 | 4 | 1 |