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])

Parameters

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.

Return value

A signed 64-bit float number.

Errors thrown

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

Description

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

Examples

Using the getFloat64 method

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

Specifications

Specification Status Comment
Typed Array Specification Obsolete Superseded by ECMAScript 2015.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'DataView.prototype.getFloat64' in that specification.
Standard Initial definition in ECMA standard.
ECMAScript Latest Draft (ECMA-262)
The definition of 'DataView.prototype.getFloat64' in that specification.
Living Standard  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support912151012.15.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support4 Yes Yes1510124.2

See also

Document Tags and Contributors

 Contributors to this page: fscholz, jameshkramer, kdex, joemccourt, ibratoev, eduardoboucas
 Last updated by: fscholz,