# contains(_:) Returns a Boolean value indicating whether the sequence contains the given element. ``` func contains(_ element: Self.Element) -> Bool ``` ## Parameters `element` The element to find in the sequence. ## Return Value `true` if the element was found in the sequence; otherwise, `false`. ## Discussion This example checks to see whether a favorite actor is in an array storing a movie’s cast. ``` let cast = ["Vivien", "Marlon", "Kim", "Karl"] print(cast.contains("Marlon")) // Prints "true" print(cast.contains("James")) // Prints "false" ``` > Complexity: O(*n*), where *n* is the length of the sequence. --- 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)