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# rounding(accordingToBehavior:)

Returns a rounded version of the decimal number using the specified rounding behavior.

```
func rounding(accordingToBehavior behavior: (any NSDecimalNumberBehaviors)?) -> NSDecimalNumber
```

## Discussion

For a description of the different ways of rounding, see the [`roundingMode`](/documentation/Foundation/NumberFormatter/roundingMode-swift.property) method in the [`NSDecimalNumberBehaviors`](/documentation/Foundation/NSDecimalNumberBehaviors) protocol specification.

---

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