---
title: negativePrefix
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/numberformatter/negativeprefix
---

# negativePrefix

The string the receiver uses as a prefix for negative values.

## Declaration

```swift
var negativePrefix: String! { get set }
```

## See Also

### Configuring Numeric Prefixes and Suffixes

- [positivePrefix](foundation/numberformatter/positiveprefix.md)
- [positiveSuffix](foundation/numberformatter/positivesuffix.md)
- [negativeSuffix](foundation/numberformatter/negativesuffix.md)