Dart function

Dart programs has an entry point called main. When you run flutter or dart file it first runs main function. In this case the main function is calling flutter specific function called runApp which takes any widget as an argument and created a layout which fills the screen.

4 Answers. In Dart, main() acts as the entry point for the program whereas runApp() attaches the given widget to the screen . According to this post, it’s possible to establish configuration variables before actually attaching the first widget.

void main() => runApp(MyApp()); The main function by itself is the Dart entry point of an application . What makes the Flutter application take the scene is the runApp function called by passing a widget as a parameter, which will be the root widget of the application (the application itself).

In order to write any Dart program, be it a script or a Flutter app, you must define a function called main . This function tells Dart where the program starts, and it must be in the file that is considered the “entry point” for you program . By convention, this will be in a file called main.