javascript instance method
DataView.prototype.getFloat32()
The getFloat32() method of DataView instances reads 4 bytes starting at the specified byte offset of this DataView and interprets them as a 32-bit floating point number. There is no alignment constraint; multi-byte values may be fetched from any offset within bounds.
Interactive exampleOpen the canonical MDN source to run this embedded demo.
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
const view = new DataView(buffer);
view.setFloat32(1, Math.PI);
console.log(view.getFloat32(1));
// Expected output: 3.1415927410125732
Syntax
getFloat32(byteOffset)
getFloat32(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.
- : Indicates whether the data is stored in little- or big-endian format. If
Return value
A floating point number from -3.4e38 to 3.4e38.
Exceptions
RangeError- : Thrown if the
byteOffsetis set such that it would read beyond the end of the view.
- : Thrown if the
Examples
Using getFloat32()
const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getFloat32(1)); // 2.387939260590663e-38
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.