# leave() Explicitly indicates that a block in the group finished executing. ``` func leave() ``` ## Discussion Calling this function decrements the current count of outstanding tasks in the group. Using this function (with [`enter()`](/documentation/Dispatch/DispatchGroup/enter())) allows your application to properly manage the task reference count if it explicitly adds and removes tasks from the group by a means other than using the [`dispatch_group_async`](/documentation/Dispatch/dispatch_group_async) function. A call to this function must balance a call to [`enter()`](/documentation/Dispatch/DispatchGroup/enter()). It is invalid to call it more times than [`enter()`](/documentation/Dispatch/DispatchGroup/enter()), which would result in a negative count. --- 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)