---
title: Data.Index
framework: foundation
role: symbol
role_heading: Type Alias
path: foundation/data/index
---

# Data.Index

A type used to indicate a position in a data’s buffer.

## Declaration

```swift
typealias Index = Int
```

## See Also

### Manipulating Indexes

- [startIndex](foundation/data/startindex.md)
- [endIndex](foundation/data/endindex.md)
- [index(after:)](foundation/data/index(after:).md)
- [index(before:)](foundation/data/index(before:).md)