Stateless Widget	Stateful Widget
Static widgets	Dynamic Widgets
They do not depend on any data change or any behaviour change.	They can be updated during runtime based on user action or data change.
Stateless Widgets do not have a state.	Stateful Widgets have an internal state.
They will be rendered once and will not update themselves, but will only be updated when external data changes.	They can re-render if the input data changes or if Widget’s state changes.
For Example, Text, Icon, and RaisedButton are Stateless Widgets.	For Example Checkbox, Radio Button, and Slider are Stateful Widgets

Stateless vs Stateful Widget