---
title: popLast()
framework: swift
role: symbol
role_heading: Instance Method
path: swift/substring/unicodescalarview/poplast()-7zgh4
---

# popLast()

Removes and returns the last element of the collection.

## Declaration

```swift
mutating func popLast() -> Self.Element?
```

## Return Value

Return Value The last element of the collection if the collection is not empty; otherwise, nil.

## Discussion

Discussion Calling this method may invalidate all saved indices of this collection. Do not rely on a previously stored index value after altering a collection with any operation that can change its length. note: O(1)