# first(where:) Returns the first element of the sequence that satisfies the given predicate. ``` func first(where predicate: (Self.Element) async throws -> Bool) async rethrows -> Self.Element? ``` ## Parameters `predicate` A closure that takes an element of the asynchronous sequence as its argument and returns a Boolean value that indicates whether the element is a match. ## Return Value The first element of the sequence that satisfies `predicate`, or `nil` if there is no element that satisfies `predicate`. ## Discussion In this example, an asynchronous sequence called `Counter` produces `Int` values from `1` to `10`. The `first(where:)` method returns the first member of the sequence that’s evenly divisible by both `2` and `3`. ``` let divisibleBy2And3 = await Counter(howHigh: 10) .first { $0 % 2 == 0 && $0 % 3 == 0 } print(divisibleBy2And3 ?? "none") // Prints "6" ``` The predicate executes each time the asynchronous sequence produces an element, until either the predicate finds a match or the sequence ends. --- 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)