# init(_:_:_:) Creates a regex component that matches the given component repeated a number of times specified by the given range expression. ``` init(_ expression: some RangeExpression, _ behavior: RegexRepetitionBehavior? = nil, @RegexComponentBuilder _ componentBuilder: () -> some RegexComponent) where Output == Substring ``` ## Parameters `expression` A range expression specifying the number of times that `component` can repeat. `behavior` The repetition behavior to use when repeating `component` in the match. If `behavior` is `nil`, the default repetition behavior is used, which can be changed from `eager` by calling `repetitionBehavior(_:)` on the resulting `Regex`. `componentBuilder` A builder closure that creates the regex component to repeat. --- 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)