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# Subscribers

A namespace for types that serve as subscribers.

```
enum Subscribers
```

## Topics

### Requesting elements

[`Subscribers.Demand`](/documentation/Combine/Subscribers/Demand)

A requested number of items, sent to a publisher from a subscriber through the subscription.

### Receiving life cycle events

[`Subscribers.Completion`](/documentation/Combine/Subscribers/Completion)

A signal that a publisher doesn’t produce additional elements, either due to normal completion or an error.

### Using convenience subscribers

[`Subscribers.Sink`](/documentation/Combine/Subscribers/Sink)

A simple subscriber that requests an unlimited number of values upon subscription.

[`Subscribers.Assign`](/documentation/Combine/Subscribers/Assign)

A simple subscriber that assigns received elements to a property indicated by a key path.


---

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