Web/JavaScript/Reference/Global objects/DataView/getFloat64

The getFloat64() method gets a signed 64-bit float (double) at the specified byte offset from the start of the DataView.

Syntax

dataview.getFloat64(byteOffset [, littleEndian])

byteOffset: The offset, in byte, from the start of the view where to read the data.
littleEndian: Optional Indicates whether the 64-bit float is stored in little- or big-endian format. If false or undefined, a big-endian value is read.

A signed 64-bit float number.

RangeError: Thrown if the byteOffset is set such as it would read beyond the end of the view.

There is no alignment constraint; multi-byte values may be fetched from any offset.

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getFloat64(0); // 0

Specification
ECMAScript (ECMA-262)The definition of 'DataView.prototype.getFloat64' in that specification.

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`getFloat64`	Chrome Full support 9	Edge Full support 12	Firefox Full support 15	IE Full support 10	Opera Full support 12.1	Safari Full support 5.1	WebView Android Full support 4	Chrome Android Full support 18	Firefox Android Full support 15	Opera Android Full support 12.1	Safari iOS Full support 4.2	Samsung Internet Android Full support 1.0	nodejs Full support 0.10