# encodeEncodable(_:forKey:) Encodes a given value and associates it with a key. ``` @nonobjc func encodeEncodable(_ value: T, forKey key: String) throws where T : Encodable ``` ## Parameters `value` The value to encode. `key` The key with which to associate the encoded value. ## Discussion If there’s a problem encoding the value you supply, this method throws an error based on the type of problem: - The value fails to encode, or contains a nested value that fails to encode—this method throws the corresponding error. - The value can’t be encoded as a property list—this method throws the error. --- 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)