---
title: "update(with:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/indexset/update(with:)"
---

# update(with:)

Insert an integer into the IndexSet.

## Declaration

```swift
@discardableResult mutating func update(with integer: IndexSet.Element) -> IndexSet.Element?
```

## See Also

### Inserting Elements

- [insert(_:)](foundation/indexset/insert(_:).md)
- [insert(integersIn:)](foundation/indexset/insert(integersin:)-28eld.md)