# init(locale:) Creates a floating-point format style that uses the given locale. ``` init(locale: Locale = .autoupdatingCurrent) ``` ## Parameters `locale` The locale to use when formatting or parsing floating-point values. Defaults to [`autoupdatingCurrent`](/documentation/Foundation/Locale/autoupdatingCurrent). ## Discussion Create a [`FloatingPointFormatStyle`](/documentation/Foundation/FloatingPointFormatStyle) when you intend to apply a given style to multiple floating-point values. The following example creates a style that uses the `en_US` locale, which uses three-based grouping and comma separators. It then applies this style to all the values in an array. ```swift let enUSstyle = FloatingPointFormatStyle(locale: Locale(identifier: "en_US")) let nums = [100.1, 1000.2, 10000.3, 100000.4, 1000000.5] let formattedNums = nums.map { enUSstyle.format($0) } // ["100.1", "1,000.2", "10,000.3", "100,000.4", "1,000,000.5"] ``` To format a single integer, you can use the instance method , passing in an instance of [`FloatingPointFormatStyle`](/documentation/Foundation/FloatingPointFormatStyle). --- 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)