# notation(_:) Modifies the format style to use the specified notation. ``` func notation(_ notation: IntegerFormatStyle.Configuration.Notation) -> IntegerFormatStyle ``` ## Parameters `notation` The notation to apply to the format style. ## Return Value An integer format style modified to use the specified notation. ## Discussion The following example creates a default [`IntegerFormatStyle`](/documentation/Foundation/IntegerFormatStyle) for the `en_US` locale, and a second style that uses scientific notation style. It then applies each style to an array of integers. ```swift let defaultStyle = IntegerFormatStyle(locale: Locale(identifier: "en_US")) let scientificStyle = defaultStyle.notation(.scientific) let nums = [100, 1000, 10000, 100000, 1000000] let defaultNums = nums.map { defaultStyle.format($0) } // ["100", "1,000", "10,000", "100,000", "1,000,000"] let scientificNums = nums.map { scientificStyle.format($0) } // ["1E2", "1E3", "1E4", "1E5", "1E6"] ``` --- 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)