# dlapy3_(_:_:_:) ``` func dlapy3_(_ x: UnsafePointer, _ y: UnsafePointer, _ z: UnsafePointer) -> Double ``` --- 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)