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