DataView.prototype.getFloat64() - JavaScript | MDN
Try it
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
const view = new DataView(buffer);
view.setFloat64(1, Math.PI);
console.log(view.getFloat64(1));
// Expected output: 3.141592653589793
Syntax
js
getFloat64(byteOffset)
getFloat64(byteOffset, littleEndian)
Parameters
byteOffset-
The offset, in bytes, from the start of the view to read the data from.
littleEndianOptional-
Indicates whether the data is stored in little- or big-endian format. If
falseorundefined, a big-endian value is read.
Return value
Any number value.
Exceptions
RangeError-
Thrown if the
byteOffsetis set such that it would read beyond the end of the view.
Examples
Using getFloat64()
js
const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getFloat64(1)); // 8.20788039913184e-304
Specifications
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-dataview.prototype.getfloat64 |