---
title: isValid
framework: createml
role: symbol
role_heading: Instance Property
path: createml/mluntypedcolumn/isvalid
---

# isValid

A Boolean value that indicates whether the column is valid.

## Declaration

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

## Discussion

Discussion Check isValid after you create or mutate an untyped column to ensure it’s valid. If the value is false, the untyped column encountered an error and you can’t use it for subsequent operations. For example, comparing two columns of different sizes creates an invalid column.

## See Also

### Handling untyped column errors

- [error](createml/mluntypedcolumn/error.md)