# Subscribers.Demand A requested number of items, sent to a publisher from a subscriber through the subscription. ``` @frozen struct Demand ``` ## Topics ### Creating a demand instance [`max(_:)`](/documentation/Combine/Subscribers/Demand/max(_:)) Creates a demand for the given maximum number of elements. ### Using special demands [`unlimited`](/documentation/Combine/Subscribers/Demand/unlimited) A request for as many values as the publisher can produce. [`none`](/documentation/Combine/Subscribers/Demand/none) A request for no elements from the publisher. ### Inspecing demand properties [`max`](/documentation/Combine/Subscribers/Demand/max) The number of requested values. ### Encoding and decoding [`encode(to:)`](/documentation/Combine/Subscribers/Demand/encode(to:)) Encodes the demand to the provide encoder. [`init(from:)`](/documentation/Combine/Subscribers/Demand/init(from:)) Creates a demand instance from a decoder. ### Performing mathematical operations [`*(_:_:)`](/documentation/Combine/Subscribers/Demand/*(_:_:)) Returns the result of multiplying a demand by an integer. [`*=(_:_:)`](/documentation/Combine/Subscribers/Demand/*=(_:_:)) Multiplies a demand by an integer, and assigns the result to the demand. [`+(_:_:)`](/documentation/Combine/Subscribers/Demand/+(_:_:)-2hdad) Returns the result of adding two demands. When adding any value to `.unlimited`, the result is `.unlimited`. [`+(_:_:)`](/documentation/Combine/Subscribers/Demand/+(_:_:)-902we) Returns the result of adding an integer to a demand. [`+=(_:_:)`](/documentation/Combine/Subscribers/Demand/+=(_:_:)-20lis) Adds two demands, and assigns the result to the first demand. [`+=(_:_:)`](/documentation/Combine/Subscribers/Demand/+=(_:_:)-3k1hv) Adds an integer to a demand, and assigns the result to the demand. [`-(_:_:)`](/documentation/Combine/Subscribers/Demand/-(_:_:)-1r0gm) Returns the result of subtracting one demand from another. [`-(_:_:)`](/documentation/Combine/Subscribers/Demand/-(_:_:)-6mw4s) Returns the result of subtracting an integer from a demand. [`-=(_:_:)`](/documentation/Combine/Subscribers/Demand/-=(_:_:)-1d0m9) Subtracts one demand from another, and assigns the result to the first demand. [`-=(_:_:)`](/documentation/Combine/Subscribers/Demand/-=(_:_:)-9pwnc) Subtracts an integer from a demand, and assigns the result to the demand. ### Comparing demands [`==(_:_:)`](/documentation/Combine/Subscribers/Demand/==(_:_:)-4oy8i) Returns a Boolean value that indicates whether a given number of elements matches the request of a given demand. [`==(_:_:)`](/documentation/Combine/Subscribers/Demand/==(_:_:)-7246z) Returns a Boolean value that indicates whether a demand requests the given number of elements. [`!=(_:_:)`](/documentation/Combine/Subscribers/Demand/!=(_:_:)-3j2h8) Returns a Boolean value that indicates whether an integer is unequal to a demand. [`!=(_:_:)`](/documentation/Combine/Subscribers/Demand/!=(_:_:)-2dj1p) Returns a Boolean value that indicates whether a demand isn’t equal to an integer. [`<(_:_:)`](/documentation/Combine/Subscribers/Demand/_(_:_:)-1wuod) Returns a Boolean that indicates a given number of elements is less than the maximum specified by the demand. [`<(_:_:)`](/documentation/Combine/Subscribers/Demand/_(_:_:)-ciby) Returns a Boolean that indicates whether the demand requests fewer than the given number of elements. [`<(_:_:)`](/documentation/Combine/Subscribers/Demand/_(_:_:)-8nf1g) Returns a Boolean that indicates whether the first demand requests fewer elements than the second. [`<=(_:_:)`](/documentation/Combine/Subscribers/Demand/_=(_:_:)-5f62z) Returns a Boolean value that indicates a given number of elements is less than or equal the maximum specified by the demand. [`<=(_:_:)`](/documentation/Combine/Subscribers/Demand/_=(_:_:)-2otvi) Returns a Boolean that indicates whether the demand requests fewer or the same number of elements as the given integer. [`<=(_:_:)`](/documentation/Combine/Subscribers/Demand/_=(_:_:)-9cywv) Returns a Boolean value that indicates whether the first demand requests fewer or the same number of elements as the second. [`>(_:_:)`](/documentation/Combine/Subscribers/Demand/_(_:_:)-35p6f) Returns a Boolean that indicates a given number of elements is greater than the maximum specified by the demand. [`>(_:_:)`](/documentation/Combine/Subscribers/Demand/_(_:_:)-4k1xp) Returns a Boolean that indicates whether the demand requests more than the given number of elements. [`>(_:_:)`](/documentation/Combine/Subscribers/Demand/_(_:_:)-74yle) Returns a Boolean that indicates whether the first demand requests more elements than the second. [`>=(_:_:)`](/documentation/Combine/Subscribers/Demand/_=(_:_:)-6lv9s) Returns a Boolean that indicates a given number of elements is greater than or equal to the maximum specified by the demand. [`>=(_:_:)`](/documentation/Combine/Subscribers/Demand/_=(_:_:)-28c1e) Returns a Boolean that indicates whether the first demand requests more or the same number of elements as the second. [`>=(_:_:)`](/documentation/Combine/Subscribers/Demand/_=(_:_:)-5xnt) Returns a Boolean that indicates whether the first demand requests more or the same number of elements as the second. --- 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)