# decode(_:forKey:) Decodes a value of the given type for the given key. ``` func decode(_ type: T.Type, forKey key: KeyedDecodingContainer.Key) throws -> T where T : Decodable ``` ## Parameters `type` The type of value to decode. `key` The key that the decoded value is associated with. ## Return Value A value of the requested type, if present for the given key and convertible to the requested type. ## Discussion> throws: `DecodingError.typeMismatch` if the encountered encoded value > is not convertible to the requested type. > throws: `DecodingError.keyNotFound` if `self` does not have an entry > for the given key. > throws: `DecodingError.valueNotFound` if `self` has a null entry for > the given key. --- 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)