---
title: isUndefined
framework: coreml
role: symbol
role_heading: Instance Property
path: coreml/mlfeaturevalue/isundefined
---

# isUndefined

A Boolean value that indicates whether the feature value is undefined or missing.

## Declaration

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

## See Also

### Accessing the feature’s value

- [int64Value](coreml/mlfeaturevalue/int64value.md)
- [doubleValue](coreml/mlfeaturevalue/doublevalue.md)
- [stringValue](coreml/mlfeaturevalue/stringvalue.md)
- [imageBufferValue](coreml/mlfeaturevalue/imagebuffervalue.md)
- [shapedArrayValue(of:)](coreml/mlfeaturevalue/shapedarrayvalue(of:).md)
- [multiArrayValue](coreml/mlfeaturevalue/multiarrayvalue.md)
- [sequenceValue](coreml/mlfeaturevalue/sequencevalue.md)
- [dictionaryValue](coreml/mlfeaturevalue/dictionaryvalue.md)