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])

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Typed Array Specification	Obsolete	Superseded by ECMAScript 2015.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 2017 Draft (ECMA-262) The definition of 'DataView.prototype.getFloat64' in that specification.	Draft

Browser compatibility

See also

• DataView
• ArrayBuffer