---
title: isFinite
framework: swift
role: symbol
role_heading: Instance Property
path: swift/double/isfinite
---

# isFinite

A Boolean value indicating whether this instance is finite.

## Declaration

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

## Discussion

Discussion All values other than NaN and infinity are considered finite, whether normal or subnormal.  For NaN, both isFinite and isInfinite are false.

## See Also

### Querying a Double’s State

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