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# progress

A value that indicates how much of the file has been downloaded.

```
var progress: Float { get }
```

## Discussion

The value of this property is a floating point number between `0.0` and `1.0`, inclusive, where `0.0` means no data has been download and `1.0` means all the data has been downloaded. Typically, your app uses the value of this property to update a user interface element, such as a progress bar, that displays how much of the file has been downloaded.

Do not use the value of this property to determine whether the download has completed. Instead, use the [`downloadState`](/documentation/StoreKit/SKDownload/downloadState) property.

---

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