Problem Statement
What is the difference between Expanded and Flexible widgets?
Explanation
Expanded is a shorthand for Flexible with fit: FlexFit.tight, forcing its child to fill all available space along the main axis of Row or Column. The child must occupy the space allocated by the flex value, even if it would prefer to be smaller. Use Expanded when you want widgets to fill available space proportionally.
Flexible with fit: FlexFit.loose (default) allows its child to be smaller than the allocated space if the child wants to be smaller. The child can occupy up to the allocated space but isn't forced to fill it all. Use Flexible when you want to give widgets the option to expand but allow them to be smaller if their natural size is less.
Both use the flex property (default 1) to determine how much space to allocate relative to other Flexible/Expanded children. For example, if two children have flex: 1, they split available space equally. If one has flex: 2 and another flex: 1, the first gets twice the space. Understanding this distinction helps create responsive layouts.
