Flutter Widget function

According to Flutter’s official website, which is the very first resource for learning about anything Flutter, ” 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 “.

A widget is either stateful or stateless. If a widget can change—when a user interacts with it, for example—it’s stateful. A stateless widget never changes . Icon , IconButton , and Text are examples of stateless widgets.

Stateful Widgets are dynamic widgets . They can be updated during runtime based on user action or data change. Stateful Widgets have an internal state and can re-render if the input data changes or if Widget’s state changes. For Example: Checkbox, Radio Button, Slider are Stateful Widgets.

The runApp() function takes the given Widget and makes it the root of the widget tree . In this example, the widget tree consists of two widgets, the Center widget and its child, the Text widget. The framework forces the root widget to cover the screen, which means the text “Hello, world” ends up centered on screen.

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