---
title: init()
framework: dispatch
role: symbol
role_heading: Initializer
path: dispatch/dispatchgroup/init()
---

# init()

Creates a new group to which you can assign block objects.

## Declaration

```swift
init()
```

## Return Value

Return Value The newly created group. In Objective-C returns NULL on failure.

## Discussion

Discussion This function creates a new group with which block objects can be associated (by using the dispatch_group_async function). The dispatch group maintains a count of its outstanding associated tasks, incrementing the count when a new task is associated and decrementing it when a task completes. Functions such as dispatch_group_notify and dispatch_group_wait use that count to allow your application to determine when all tasks associated with the group have completed. At that time, your application can take any appropriate action.