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

# NumberFormatter.Behavior

These constants specify the behavior of a number formatter. These constants are returned by the defaultFormatterBehavior() class method and the formatterBehavior property.

## Declaration

```swift
enum Behavior
```

## Topics

### Constants

- [NumberFormatter.Behavior.default](foundation/numberformatter/behavior/default.md)
- [NumberFormatter.Behavior.behavior10_0](foundation/numberformatter/behavior/behavior10_0.md)
- [NumberFormatter.Behavior.behavior10_4](foundation/numberformatter/behavior/behavior10_4.md)

### Initializers

- [init(rawValue:)](foundation/numberformatter/behavior/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Constants

- [NumberFormatter.Style](foundation/numberformatter/style.md)
- [NumberFormatter.PadPosition](foundation/numberformatter/padposition.md)
- [NumberFormatter.RoundingMode](foundation/numberformatter/roundingmode-swift.enum.md)