What is the widget that has a mutable state?

Stateful widgets have a mutable state, i.e., they are mutable and can be drawn multiple times within its lifetime. They are the widgets which can change their state multiple times and can be redrawn on to the screen any number of times while the app is in action.

Stateful and stateless widgets 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.

Stateless Widget: The widgets whose state can not be altered once they are built are called stateless widgets. These widgets are immutable once they are built i.e any amount of change in the variables, icons, buttons, or retrieving data can not change the state of the app.19 Mar 2021