---
title: undefinedVariable
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/predicateerror/undefinedvariable
---

# undefinedVariable

## Declaration

```swift
static let undefinedVariable: PredicateError
```

## See Also

### Errors

- [forceCastFailure](foundation/predicateerror/forcecastfailure.md)
- [forceUnwrapFailure](foundation/predicateerror/forceunwrapfailure.md)
- [invalidInput](foundation/predicateerror/invalidinput.md)