# Zip2Sequence A sequence of pairs built out of two underlying sequences. ``` @frozen struct Zip2Sequence where Sequence1 : Sequence, Sequence2 : Sequence ``` ## Overview In a `Zip2Sequence` instance, the elements of the *i*th pair are the *i*th elements of each underlying sequence. To create a `Zip2Sequence` instance, use the `zip(_:_:)` function. The following example uses the `zip(_:_:)` function to iterate over an array of strings and a countable range at the same time: ``` let words = ["one", "two", "three", "four"] let numbers = 1...4 for (word, number) in zip(words, numbers) { print("\(word): \(number)") } // Prints "one: 1" // Prints "two: 2" // Prints "three: 3" // Prints "four: 4" ``` --- 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)