---
title: init()
framework: foundation
role: symbol
role_heading: Initializer
path: foundation/nsmutabledictionary/init()
---

# init()

Initializes a newly allocated mutable dictionary.

## Declaration

```swift
init()
```

## Return Value

Return Value A mutable dictionary.

## Discussion

Discussion This method is a designated initializer of NSMutableDictionary.

## See Also

### Creating and Initializing a Mutable Dictionary

- [init(capacity:)](foundation/nsmutabledictionary/init(capacity:).md)
- [init(sharedKeySet:)](foundation/nsmutabledictionary/init(sharedkeyset:).md)