---
title: roundingRule
framework: swift
role: symbol
role_heading: Instance Property
path: swift/duration/unitsformatstyle/fractionalpartdisplaystrategy/roundingrule
---

# roundingRule

The rule for rounding a unit up or down if it has a fractional part.

## Declaration

```swift
var roundingRule: FloatingPointRoundingRule
```

## See Also

### Working with strategy properties

- [minimumLength](swift/duration/unitsformatstyle/fractionalpartdisplaystrategy/minimumlength.md)
- [maximumLength](swift/duration/unitsformatstyle/fractionalpartdisplaystrategy/maximumlength.md)
- [roundingIncrement](swift/duration/unitsformatstyle/fractionalpartdisplaystrategy/roundingincrement.md)