# hash(data:) Computes the digest of the bytes in the given data instance and returns the computed digest. ``` static func hash(data: D) -> Self.Digest where D : DataProtocol ``` ## Parameters `data` The data whose digest the hash function should compute. This can be any type that conforms to , like or an array of instances. ## Return Value The computed digest of the data. ## Discussion Use this method if all your data fits into a single data instance. If the data you want to hash is too large, initialize a hash function and use the [`update(data:)`](/documentation/CryptoKit/HashFunction/update(data:)) and [`finalize()`](/documentation/CryptoKit/HashFunction/finalize()) methods to compute the digest in blocks. --- 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)