What is runApp Flutter?

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.

In the Flutter SDK the . of methods are a kind of service locator function that take the framework BuildContext as an argument and return an internal API related to the named class but created by widgets higher up the widget tree .

A widget that does not require mutable state . A stateless widget is a widget that describes part of the user interface by building a constellation of other widgets that describe the user interface more concretely.

The runApp() function takes the given Widget and makes it the root of the widget tree. … A widget’s main job is to implement a build() function, which describes the widget in terms of other, lower-level widgets.

Flutter 2.5, the latest version of Google’s UI toolkit for native application development , offers better performance as well as full-screen enhancements for Android.