files/en-us/web/javascript/reference/global_objects/dataview/getint32/index.md

metadata

title: DataView.prototype.getInt32()
short-title: getInt32()
slug: Web/JavaScript/Reference/Global_Objects/DataView/getInt32
page-type: javascript-instance-method
browser-compat: javascript.builtins.DataView.getInt32
sidebar: jsref

The getInt32() method of {{jsxref("DataView")}} instances reads 4 bytes starting at the specified byte offset of this DataView and interprets them as a 32-bit signed integer. There is no alignment constraint; multi-byte values may be fetched from any offset within bounds.

{{InteractiveExample("JavaScript Demo: DataView.prototype.getInt32()")}}

// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);

const view = new DataView(buffer);
view.setInt32(1, 2147483647); // Max signed 32-bit integer

console.log(view.getInt32(1));
// Expected output: 2147483647

Syntax

getInt32(byteOffset)
getInt32(byteOffset, littleEndian)

Parameters

• byteOffset
  • : The offset, in bytes, from the start of the view to read the data from.
• littleEndian {{optional_inline}}
  • : Indicates whether the data is stored in little- or big-endian format. If false or undefined, a big-endian value is read.

Return value

An integer from -2147483648 to 2147483647, inclusive.

Exceptions

• {{jsxref("RangeError")}}
  • : Thrown if the byteOffset is set such that it would read beyond the end of the view.

Examples

Using getInt32()

const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getInt32(1)); // 16909060

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• JavaScript typed arrays guide
• {{jsxref("DataView")}}
• {{jsxref("ArrayBuffer")}}
• {{jsxref("Int32Array")}}