---
title: startIndex
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/jointtransforms/startindex
---

# startIndex

An index to the first joint transform in the collection.

## Declaration

```swift
var startIndex: JointTransforms.Index { get }
```

## Discussion

Discussion For more on the sequence’s beginning index, see startIndex.

## See Also

### Inspecting joint transform details

- [endIndex](realitykit/jointtransforms/endindex.md)