---
title: main()
framework: uikit
role: symbol
role_heading: Type Method
path: uikit/uiapplicationdelegate/main()
---

# main()

Provides the top-level entry point for the app.

## Declaration

```swift
@MainActor @preconcurrency static func main()
```

## Discussion

Discussion UIApplicationDelegate provides an implementation of the main() method so that it can serve as the main entry point for a UIKit app. The system calls the main() method to launch your app; you never call it yourself. You can have exactly one entry point in your app, which you mark with the @main attribute.