# append(_:count:) Appends the specified bytes from memory to the end of the data. ``` mutating func append(_ bytes: UnsafePointer, count: Int) ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)