---
title: numberingSystem
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/locale/components/numberingsystem
---

# numberingSystem

The numbering system used by the locale.

## Declaration

```swift
var numberingSystem: Locale.NumberingSystem?
```

## Discussion

Discussion Set this property to override the locale’s default numbering system. To request the default numbering system used by the locale, use the Locale property numberingSystem. This property corresponds to the nu key of the Unicode BCP 47 extension.

## See Also

### Specifiying measurement and counting components

- [currency](foundation/locale/components/currency.md)
- [Locale.Currency](foundation/locale/currency-swift.struct.md)
- [measurementSystem](foundation/locale/components/measurementsystem.md)
- [Locale.MeasurementSystem](foundation/locale/measurementsystem-swift.struct.md)
- [Locale.NumberingSystem](foundation/locale/numberingsystem-swift.struct.md)