---
title: featureColumns
framework: createml
role: symbol
role_heading: Instance Property
path: createml/mldecisiontreeclassifier/featurecolumns
---

# featureColumns

The names of the columns you selected at initialization to train the classifier.

## Declaration

```swift
var featureColumns: [String]
```

## Discussion

Discussion Changing the value of this property doesn’t retrain the model or affect its behavior.

## See Also

### Training a decision tree classifier synchronously

- [train(trainingData:targetColumn:featureColumns:parameters:sessionParameters:)](createml/mldecisiontreeclassifier/train(trainingdata:targetcolumn:featurecolumns:parameters:sessionparameters:).md)
- [targetColumn](createml/mldecisiontreeclassifier/targetcolumn.md)