How to use margin in css

The margin attribute in CSS is used to control the blank area around the element, including the four directions of up, down, left and right. The syntax is margin: [ [ []].

Usage of margin in CSS

The margin property is used to control the blank area around the element. It can set the margin of the element relative to its parent element. external space.

Syntax

<code>margin: <length | auto> [<length | auto> [<length | auto> [<length | auto>]]]</code>

Parameters

• :In pixels (px), centimeters (cm), inches (in) Dimensions specified in equal units.
• : Automatically set margin according to the browser's default value.

Four margin values

The margin attribute can specify four separate values ​​to control the white space in different directions around the element:

1. margin-top: Control the blank area above the element.
2. margin-right: Control the blank area on the right side of the element.
3. margin-bottom: Control the blank area below the element.
4. margin-left: Control the blank area on the left side of the element.

Set a single margin value

To set only one margin value, you can provide a parameter. For example:

<code>margin: 20px;</code>

This will add 20px of white space around the element.

Set multiple margin values

To set multiple margin values, you can provide multiple parameters. For example:

<code>margin: 10px 20px 30px 40px;</code>

This would specify for the element:

• Above: 10px
• Right: 20px
• Bottom: 30px
• Left side: 40px

Use the auto keyword

The auto keyword instructs the browser to automatically calculate the margin value. This is useful in certain situations, for example:

<code>margin: auto;</code>

This will center the element horizontally within the parent element.

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