Can anyone explain to me how to use SHA256. I tried the example on the website https://www.hackingwithswift.com/example-code/cryptokit/how-to-calculate-the-sha-hash-of-a-string-or-data-instance

import CryptoKit

let inputString = "Hello, world!"
let inputData = Data(inputString.utf8)

let hashed = SHA256.hash(data: inputData)

I just get an error in playgrounds of

error: Couldn't lookup symbols:
  static CryptoKit.HashFunction.hash<τ_0_0 where τ_1_0: Foundation.DataProtocol>(data: τ_1_0) -> τ_0_0.Digest
  static CryptoKit.HashFunction.hash<τ_0_0 where τ_1_0: Foundation.DataProtocol>(data: τ_1_0) -> τ_0_0.Digest
  static CryptoKit.HashFunction.hash<τ_0_0 where τ_1_0: Foundation.DataProtocol>(data: τ_1_0) -> τ_0_0.Digest
  static CryptoKit.HashFunction.hash<τ_0_0 where τ_1_0: Foundation.DataProtocol>(data: τ_1_0) -> τ_0_0.Digest

It's an issue in the iOS playground. It will work in the Playgrounds app or using a macOS playground in Xcode.

But I am using macOS playground in Xcode