CSS margin property

Property values

0 lengthDefault

0

There is no thickness of the margin area.

margin: 0;

Try it { }

+ve length

20

There is 20px space around the box.

margin: 20px;

Try it { }

-ve length

-20

The space around the box decreases by 20px i.e. the content below this box may merge into this box.

margin: -20px;

Try it { }