---
title: numberFormatter
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/measurementformatter/numberformatter
---

# numberFormatter

The number formatter used to format the quantity of a measurement.

## Declaration

```swift
@NSCopying var numberFormatter: NumberFormatter! { get set }
```

## Discussion

Discussion If unspecified, an NumberFormatter object with NumberFormatter.Style.decimal style is used.

## See Also

### Specifying the Format

- [unitOptions](foundation/measurementformatter/unitoptions-swift.property.md)
- [MeasurementFormatter.UnitOptions](foundation/measurementformatter/unitoptions-swift.struct.md)
- [unitStyle](foundation/measurementformatter/unitstyle.md)
- [locale](foundation/measurementformatter/locale.md)