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The Math.fround()
function returns the nearest single precision float representation of a number.
Syntax
Math.fround(x)
Parameters
x
- A number.
Return value
The nearest single precision float representation of the given number.
Description
Because fround()
is a static method of Math
, you always use it as Math.fround()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Examples
Using Math.fround()
Math.fround(0); // 0 Math.fround(1); // 1 Math.fround(1.337); // 1.3370000123977661 Math.fround(1.5); // 1.5 Math.fround(NaN); // NaN
Polyfill
This can be emulated with the following function, if Float32Array
are supported:
Math.fround = Math.fround || (function (array) { return function(x) { return array[0] = x, array[0]; }; })(Float32Array(1));
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Math.fround' in that specification. |
Standard | Initial definition. |
ECMAScript 2017 Draft (ECMA-262) The definition of 'Math.fround' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 38 | 26 (26) | No support | 25 | 7.1 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | No support | (Yes) | (Yes) | No support | No support | 8 |
See also
Document Tags and Contributors
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