# Publishers.Count A publisher that publishes the number of elements received from the upstream publisher. ``` struct Count where Upstream : Publisher ``` ## Topics ### Creating a count Publisher [`init(upstream:)`](/documentation/Combine/Publishers/Count/init(upstream:)) Creates a publisher that publishes the number of elements received from the upstream publisher. ### Declaring supporting types [`Publishers.Count.Output`](/documentation/Combine/Publishers/Count/Output) The kind of values published by this publisher. [`Publishers.Count.Failure`](/documentation/Combine/Publishers/Count/Failure) The kind of errors this publisher might publish. ### Inspecting publisher properties [`upstream`](/documentation/Combine/Publishers/Count/upstream) The publisher from which this publisher receives elements. ### Comparing publishers [`==(_:_:)`](/documentation/Combine/Publishers/Count/==(_:_:)) Returns a Boolean value that indicates whether two publishers are equivalent. /// - Parameters: --- 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)