---
title: Array.Index
framework: swift
role: symbol
role_heading: Type Alias
path: swift/array/index
---

# Array.Index

The index type for arrays, Int.

## Declaration

```swift
typealias Index = Int
```

## See Also

### Supporting Types

- [Array.Indices](swift/array/indices.md)
- [Array.Iterator](swift/array/iterator.md)
- [Array.ArrayLiteralElement](swift/array/arrayliteralelement.md)
- [Array.SubSequence](swift/array/subsequence.md)