# withUnsafeBytes(_:) Calls a given closure with a raw pointer to the multiarray’s storage. ``` func withUnsafeBytes(_ body: (UnsafeRawBufferPointer) throws -> R) rethrows -> R ``` ## Parameters `body` A closure with an parameter that points to the storage for the multiarray. This closure takes the following parameter: - `ptr`: The pointer to the buffer. --- 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)