---
title: byteOffsets
framework: Swift
role: symbol
role_heading: Instance Property
platforms: [iOS 12.2+, iPadOS 12.2+, Mac Catalyst 12.2+, macOS 10.14.4+, tvOS 12.2+, visionOS 1.0+, watchOS 5.2+]
path: swift/outputrawspan/byteoffsets
---

# byteOffsets

The indices that are valid for subscripting the span, in ascending order.

## Declaration

```swift
var byteOffsets: Range<Int> { get }
```

## Discussion

Discussion note: O(1)