DataView.prototype.setFloat64()

The setFloat64() method of DataView instances takes a number and stores it as a 64-bit float in the 8 bytes starting at the specified byte offset of this DataView.

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Syntax

js

setFloat64(byteOffset, value)
setFloat64(byteOffset, value, littleEndian)

Parameters

byteOffset

The offset, in byte, from the start of the view where to store the data.

value

The value to set.

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 written.

Return value

undefined.

Errors thrown

RangeError

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

Examples

Using the setFloat64 method

js

const buffer = new ArrayBuffer(8);
const dataview = new DataView(buffer);
dataview.setFloat64(0, 3);
dataview.getFloat64(0); // 3

Specifications

Specification
ECMAScript Language Specification
# sec-dataview.prototype.setfloat64

Browser compatibility

BCD tables only load in the browser

See also