Answers for "padding and margin in flutter"

flutter margins

Container (
	// Even Margin On All Sides
    margin: EdgeInsets.all(10.0),
    // Symetric Margin
    margin: EdgeInsets.symmetric(vertical: 10.0, horizontal: 5.0),
    // Different Margin For All Sides
    margin: EdgeInsets.fromLTRB(1.0, 2.0, 3.0, 4.0);
    
    child: Child
    (
    	...
    ),
)

flutter padding

const Card(
  child: Padding(
    padding: EdgeInsets.all(16.0),
    child: Text('Hello World!'),
  ),
)

flutter padding

Padding(
    padding: EdgeInsets.all(16.0),
    padding: EdgeInsets.symmetric(vertical: 10.0, horizontal: 10.0),
    padding: EdgeInsets.fromLTRB(10.0, 10.0, 10.0, 10.0);
    child: Text('Padding'),
  ),