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# identifier

The identifier for the segue object.

```
var identifier: String? { get }
```

## Discussion

You assign identifiers to your segues in Interface Builder. An identifier is a string that your application uses to distinguish one segue from another. For example, if you have a source view controller that can segue to two or more different destination view controllers, you’d assign different identifiers to each segue so that the source view controller’s [`prepare(for:sender:)`](/documentation/UIKit/UIViewController/prepare(for:sender:)) method could tell them apart and prepare each segue appropriately.

---

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