# init(_:) Creates an instance equivalent to the given `ClosedRange`. ``` init(_ other: ClosedRange) ``` ## Parameters `other` A closed range to convert to a `Range` instance. ## Discussion An equivalent range must be representable as an instance of Range. For example, passing a closed range with an upper bound of `Int.max` triggers a runtime error, because the resulting half-open range would require an upper bound of `Int.max + 1`, which is not representable as an `Int`. --- 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)