---
title: "init(locale:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/integerformatstyle/init(locale:)"
---

# init(locale:)

Creates an integer format style that uses the given locale.

## Declaration

```swift
init(locale: Locale = .autoupdatingCurrent)
```

## Parameters

- `locale`: The locale to use when formatting or parsing integers. Defaults to doc://com.apple.foundation/documentation/Foundation/Locale/autoupdatingCurrent.

## Discussion

Discussion Create an IntegerFormatStyle when you intend to apply a given style to multiple integers. 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 integers in an array. let enUSstyle = IntegerFormatStyle<Int>(locale: Locale(identifier: "en_US")) let nums = [100, 1000, 10000, 100000, 1000000] let formattedNums = nums.map { enUSstyle.format($0) } // ["100", "1,000", "10,000", "100,000", "1,000,000"] To format a single integer, you can use the BinaryInteger instance method formatted(_:), passing in an instance of IntegerFormatStyle.