# formatted(_:) ``` func formatted(_ format: S) -> S.FormatOutput where S : FormatStyle, S.FormatInput == Product.SubscriptionPeriod.Unit ``` --- 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)