How to add CSS

CSS is added to HTML pages to format the document according to information in the style sheet. There are three ways to insert CSS in HTML documents.

1. Inline CSS
2. Internal CSS
3. External CSS

1. Inline CSS:
Inline CSS is used to apply CSS on a single line or element.

For example:

<p style="color:blue">Hello CSS</p>

2. Internal CSS:
Internal CSS is used to apply CSS on a single document or page. It can affect all the elements of the page. It is written inside the style tag within head section of html.

For example:

<style>
p{color:blue}
</style>

3. External CSS:
External CSS is used to apply CSS on multiple pages or all pages. Here, we write all the CSS code in a css file. Its extension must be .css for example style.css.

For example:

<link rel="stylesheet" type="text/css" href="style.css">