<ol>
<li>Inline CSS - It is added to the elements directly using style attribute.
</li>
<li>Internal CSS - It is kept inside the head tags in &lt;style&gt; tag.
</li>
<li>External CSS - It is kept separately inside a (.css) file which is further linked to the (index.html) file.
</li>
</ol>

1. Inline CSS - It is added to the elements directly using style attribute.
    
2. Internal CSS - It is kept inside the head tags in &lt;style&gt; tag.
    
3. External CSS - It is kept separately inside a (.css) file which is further linked to the (index.html) file.

There 3 ways to add CSS in HTML

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