Difference between runApp() and main() in Flutter.

 main() is the entry point of a Flutter application. It is the first function that is called when the app starts running. The main() function typically sets up the root widget for the app, creates an instance of the MyApp class, and calls runApp() with the MyApp instance as an argument.

runApp() is a Flutter function that takes a Widget as an argument and inserts it as the root widget of the Flutter app. The runApp() function is called with the root widget of the app, and it sets up the widget tree, starts the framework, and begins rendering the user interface.

In other words, the main() function is the starting point of the Flutter app, while runApp() is responsible for rendering the user interface. The main() function sets up the necessary environment for the app to run and then calls runApp() with the root widget, which starts the rendering process