# ..<(_:_:) Returns a half-open range that contains its lower bound but not its upper bound. ``` static func ..< (minimum: Self, maximum: Self) -> Range ``` ## Parameters `minimum` The lower bound for the range. `maximum` The upper bound for the range. ## Discussion Use the half-open range operator (`..<`) to create a range of any type that conforms to the `Comparable` protocol. This example creates a `Range` from zero up to, but not including, 5.0. ``` let lessThanFive = 0.0..<5.0 print(lessThanFive.contains(3.14)) // Prints "true" print(lessThanFive.contains(5.0)) // Prints "false" ``` > Precondition: `minimum <= maximum`. --- 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)