---
title: "add(_:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsmutableorderedset/add(_:)"
---

# add(_:)

Appends a given object to the end of the mutable ordered set, if it is not already a member.

## Declaration

```swift
func add(_ object: Any)
```

## Parameters

- `object`: The object to add to the set.

## See Also

### Adding, Removing, and Reordering Entries

- [add(_:count:)](foundation/nsmutableorderedset/add(_:count:).md)
- [addObjects(from:)](foundation/nsmutableorderedset/addobjects(from:).md)
- [insert(_:at:)](foundation/nsmutableorderedset/insert(_:at:)-7qg51.md)
- [insert(_:at:)](foundation/nsmutableorderedset/insert(_:at:)-3ncnm.md)
- [remove(_:)](foundation/nsmutableorderedset/remove(_:).md)
- [removeObject(at:)](foundation/nsmutableorderedset/removeobject(at:).md)
- [removeObjects(at:)](foundation/nsmutableorderedset/removeobjects(at:).md)
- [removeObjects(in:)](foundation/nsmutableorderedset/removeobjects(in:)-8h2kh.md)
- [removeObjects(in:)](foundation/nsmutableorderedset/removeobjects(in:)-9jkis.md)
- [removeAllObjects()](foundation/nsmutableorderedset/removeallobjects().md)
- [replaceObject(at:with:)](foundation/nsmutableorderedset/replaceobject(at:with:).md)
- [replaceObjects(at:with:)](foundation/nsmutableorderedset/replaceobjects(at:with:).md)
- [replaceObjects(in:with:count:)](foundation/nsmutableorderedset/replaceobjects(in:with:count:).md)
- [setObject(_:at:)](foundation/nsmutableorderedset/setobject(_:at:).md)
- [moveObjects(at:to:)](foundation/nsmutableorderedset/moveobjects(at:to:).md)