# swapAt(unchecked:unchecked:) Exchange the elements at the two given indices. ``` mutating func swapAt(unchecked i: OutputSpan.Index, unchecked j: OutputSpan.Index) ``` ## Parameters `i` A valid index into this span. `j` A valid index into this span. ## Discussion This function does not validate `i` or `j`; this is an unsafe operation. --- 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)