# count(where:) Returns the number of elements in the sequence that satisfy the given predicate. ``` func count(where predicate: (Self.Element) throws(E) -> Bool) throws(E) -> Int where E : Error ``` ## Parameters `predicate` A closure that takes each element of the sequence as its argument and returns a Boolean value indicating whether the element should be included in the count. ## Return Value The number of elements in the sequence that satisfy the given predicate. ## Discussion You can use this method to count the number of elements that pass a test. The following example finds the number of names that are fewer than five characters long: ``` let names = ["Jacqueline", "Ian", "Amy", "Juan", "Soroush", "Tiffany"] let shortNameCount = names.count(where: { $0.count < 5 }) // shortNameCount == 3 ``` To find the number of times a specific element appears in the sequence, use the equal to operator (`==`) in the closure to test for a match. ``` let birds = ["duck", "duck", "duck", "duck", "goose"] let duckCount = birds.count(where: { $0 == "duck" }) // duckCount == 4 ``` The sequence must be finite. --- 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)