---
title: isNormal
framework: swift
role: symbol
role_heading: Instance Property
path: swift/double/isnormal
---

# isNormal

A Boolean value indicating whether this instance is normal.

## Declaration

```swift
var isNormal: Bool { get }
```

## Discussion

Discussion A normal value is a finite number that uses the full precision available to values of a type. Zero is neither a normal nor a subnormal number.

## See Also

### Querying a Double’s State

- [isZero](swift/double/iszero.md)
- [isFinite](swift/double/isfinite.md)
- [isInfinite](swift/double/isinfinite.md)
- [isNaN](swift/double/isnan.md)
- [isSignalingNaN](swift/double/issignalingnan.md)
- [isSubnormal](swift/double/issubnormal.md)
- [isCanonical](swift/double/iscanonical.md)
- [floatingPointClass](swift/double/floatingpointclass.md)