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Math.fround

The Math.fround() function returns the nearest single precision float representation of a number.

Syntax

Math.fround(x)

Parameters

x

A 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(x) {
  return new Float32Array([x])[0];
};

  Created by Mozilla Contributors, license: CC-BY-SA 2.5