---
title: NumberFormatter.Behavior.behavior10_0
framework: foundation
role: symbol
role_heading: Case
path: foundation/numberformatter/behavior/behavior10_0
---

# NumberFormatter.Behavior.behavior10_0

The number-formatter behavior as it existed prior to macOS 10.4.

## Declaration

```swift
case behavior10_0
```

## See Also

### Constants

- [NumberFormatter.Behavior.default](foundation/numberformatter/behavior/default.md)
- [NumberFormatter.Behavior.behavior10_4](foundation/numberformatter/behavior/behavior10_4.md)