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# SKStoreProductParameterITunesItemIdentifier

The key representing the iTunes identifier for the item you want the store to display when the view controller is presented.

```
let SKStoreProductParameterITunesItemIdentifier: String
```

## Discussion

The value for this key, an iTunes item identifier, is an instance of <doc://com.apple.documentation/documentation/Foundation/NSNumber>.

To find a product’s iTunes identifier, go to [linkmaker.itunes.apple.com](http://linkmaker.itunes.apple.com/us/) and search for the product, then locate the iTunes identifier in the link URL. For example, the iTunes identifier for the iBooks app is 364709193.

---

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