---
title: minimumChildWeight
framework: createmlcomponents
role: symbol
role_heading: Instance Property
path: createmlcomponents/boostedtreeconfiguration/minimumchildweight
---

# minimumChildWeight

The minimum weight of each leaf node.

## Declaration

```swift
var minimumChildWeight: Double
```

## Discussion

Discussion Larger values result in more conservative tree learning and help prevent overfitting. If the tree learning algorithm results in a leaf node with the sum of instance weights less than this value, tree building will terminate. Defaults to 0.1

## See Also

### Inspecting the configuration

- [columnSubsample](createmlcomponents/boostedtreeconfiguration/columnsubsample.md)
- [earlyStoppingIterationCount](createmlcomponents/boostedtreeconfiguration/earlystoppingiterationcount.md)
- [learningRate](createmlcomponents/boostedtreeconfiguration/learningrate.md)
- [maximumDepth](createmlcomponents/boostedtreeconfiguration/maximumdepth.md)
- [maximumIterations](createmlcomponents/boostedtreeconfiguration/maximumiterations.md)
- [minimumLossReduction](createmlcomponents/boostedtreeconfiguration/minimumlossreduction.md)
- [parallelTreeCount](createmlcomponents/boostedtreeconfiguration/paralleltreecount.md)
- [randomSeed](createmlcomponents/boostedtreeconfiguration/randomseed.md)
- [rowSubsample](createmlcomponents/boostedtreeconfiguration/rowsubsample.md)
- [stepSize](createmlcomponents/boostedtreeconfiguration/stepsize.md)