HTML Comment Tags
You can add comments to your HTML source by using the following syntax:
<!– Write your comments here –>
Notice that there is an exclamation point (!) in the opening tag, but not in the closing tag.
Note: Comments are not displayed by the browser, but they can help document your HTML source code.
With comments you can place notifications and reminders in your HTML:
Example
<!– This is a comment –>
<p>This is a paragraph.</p>
<!– Remember to add more information here –>
Comments are also great for debugging HTML, because you can comment out HTML lines of code, one at a time, to search for errors:
Example
<!– Do not display this at the moment
<img border=”0″ src=”pic_mountain.jpg” alt=”Mountain”>
–>
Conditional Comments
You might stumble upon conditional comments in HTML:
<!–[if IE 9]>
…. some HTML here ….
<![endif]–>
Conditional comments defines some HTML tags to be executed by Internet Explorer only.