The getFloat64() method of DataView instances reads 8 bytes starting at the specified byte offset of this DataView and interprets them as a 64-bit floating point number. There is no alignment constraint; multi-byte values may be fetched from any offset within bounds.
Syntax
getFloat64(byteOffset)
getFloat64(byteOffset, littleEndian)
Parameters
byteOffset- : The offset, in bytes, from the start of the view to read the data from.
littleEndian- : Indicates whether the data is stored in little- or big-endian format. If
falseorundefined, a big-endian value is read.
- : Indicates whether the data is stored in little- or big-endian format. If
Return value
Any number value.
Exceptions
- RangeError
- : Thrown if the
byteOffsetis set such that it would read beyond the end of the view.
- : Thrown if the
Examples
Using getFloat64()
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