---
title: "subscript(_:)"
framework: foundation
role: symbol
role_heading: Instance Subscript
path: "foundation/data/subscript(_:)-8kg64"
---

# subscript(_:)

Accesses the byte at the specified index.

## Declaration

```swift
subscript(index: Data.Index) -> UInt8 { get set }
```

## See Also

### Accessing Bytes

- [subscript(_:)](foundation/data/subscript(_:)-6lc96.md)