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

# startIndex

An index to the first animation in the collection.

## Declaration

```swift
var startIndex: AnimationLibraryComponent.AnimationCollection.Index { get }
```

## See Also

### Manipulating indices

- [endIndex](realitykit/animationlibrarycomponent/animationcollection/endindex.md)
- [index(after:)](realitykit/animationlibrarycomponent/animationcollection/index(after:).md)
- [formIndex(after:)](realitykit/animationlibrarycomponent/animationcollection/formindex(after:).md)
- [AnimationLibraryComponent.AnimationCollection.Index](realitykit/animationlibrarycomponent/animationcollection/index.md)