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# init(locale:)

Creates a decimal format style that uses the given locale.

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

## Parameters

`locale`

The locale to use when formatting or parsing decimal values. Defaults to [`autoupdatingCurrent`](/documentation/Foundation/Locale/autoupdatingCurrent).

## Discussion

Create a [`Decimal.FormatStyle`](/documentation/Foundation/Decimal/FormatStyle) instance when you intend to apply a given style to multiple decimal 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 [`Decimal`](/documentation/Foundation/Decimal) values in an array.

```swift
let enUSstyle = Decimal.FormatStyle(locale: Locale(identifier: "en_US"))
let decimals: [Decimal] = [100.1, 1000.2, 10000.3, 100000.4, 1000000.5]
let formattedDecimals = decimals.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 [`Decimal`](/documentation/Foundation/Decimal) instance method [`formatted(_:)`](/documentation/Foundation/Decimal/formatted(_:)) passing in an instance of [`Decimal.FormatStyle`](/documentation/Foundation/Decimal/FormatStyle).

---

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