---
title: Dictionary.Keys.SubSequence
framework: swift
role: symbol
role_heading: Type Alias
path: swift/dictionary/keys-swift.struct/subsequence
---

# Dictionary.Keys.SubSequence

A collection representing a contiguous subrange of this collection’s elements. The subsequence shares indices with the original collection.

## Declaration

```swift
typealias SubSequence = Slice<Dictionary<Key, Value>.Keys>
```

## Discussion

Discussion The default subsequence type for collections that don’t define their own is Slice.