---
title: Byte Order
framework: foundation
role: collectionGroup
role_heading: API Collection
path: foundation/byte-order-constants
---

# Byte Order

Recognize constants that specify a byte-order format.

## Overview

Overview These constants are returned by NSHostByteOrder().

## Topics

### Constants

- [NS_BigEndian](foundation/ns_bigendian.md)
- [NS_LittleEndian](foundation/ns_littleendian.md)
- [NS_UnknownByteOrder](foundation/ns_unknownbyteorder.md)

## See Also

### Constants

- [NSSwappedDouble](foundation/nsswappeddouble.md)
- [NSSwappedFloat](foundation/nsswappedfloat.md)