Problem Statement
What is a Widget in Flutter?
Explanation
Widgets are immutable objects that describe the configuration of part of the user interface, not the actual visual elements themselves. They're lightweight blueprints that tell Flutter what the UI should look like for the current state, and they get rebuilt frequently when state changes without performance concerns.
Everything in Flutter is a widget - from structural elements like buttons and text to layout models like padding and alignment, and even invisible widgets like gesture detectors. You build complex UIs by composing simple widgets together in a tree structure, following the composition over inheritance principle.
Because widgets are immutable, you don't modify them directly. Instead, you create new widget configurations when you want to change the UI. This immutability makes Flutter's reactive framework work efficiently, as Flutter can quickly compare old and new widget trees to determine what actually changed.
