# init(format:lenient:) Creates a parse strategy instance using the specified integer format style. ``` init(format: Format, lenient: Bool = true) where Format == IntegerFormatStyle, Value : BinaryInteger ``` ## Parameters `format` A configured [`IntegerFormatStyle`](/documentation/Foundation/IntegerFormatStyle) that describes the string format to parse. `lenient` A Boolean value that indicates whether the parse strategy should permit some discrepencies when parsing. Defaults to `true`. ## Discussion --- 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)