# range(_:) Enforces values that fall within a range. ``` static func range(_ range: ClosedRange) -> GenerationGuide ``` ## Discussion Bounds are inclusive. A `range` generation guide may be used when you want to ensure the model produces a value that falls in some range, such as the cost for an item in a game. ```swift @Generable struct ShopItem { @Guide(description: "A creative name for an item sold in a fantasy RPG") var name: String @Guide(description: "A cost for the item", .range(0.25...1000)) var cost: Decimal } ``` --- 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)