AppBar is the widget in flutter which contains toolbar in particular flutter application. AppBar which is auto fixed toolbar at the top of the mobile screen. In AppBar, we can create different toolbar widgets like actions, menu button, icon buttons and more.
Flutter widgets are built utilizing a modern framework that takes inspiration from React. The central conception is that you build your user interface out of widgets. Widgets describe what their view should look homogeneous to given their current configuration and verbalize. Hello world Basics widgets of Flutter Text Row, Column Stack Container