What is the purpose of the Container widget in Flutter?

The Container widget is used to add padding, borders, background, transformations, and other visual properties to a child widget. It can also be used to define the size of its child if it has no constraints by default.

Main uses:

• Setting padding (inner spacing).
• Setting margin (outer spacing).
• Adding decoration (e.g., background, borders, shadows).
• Defining width and height for explicit sizing.
• Setting alignment to align the child within the Container.
• Adding transform for transforming the child.

Container(
  padding: const EdgeInsets.all(8.0), // Inner padding
  margin: const EdgeInsets.symmetric(horizontal: 16.0), // Outer margin
  decoration: BoxDecoration( // Decoration
    color: Colors.blue, // Background color
    borderRadius: BorderRadius.circular(8.0), // Rounded corners
  ),
  width: 200.0, // Width
  height: 100.0, // Height
  alignment: Alignment.center, // Child alignment
  child: Text('Hello, Container!'), // Child widget
);