The comment topic is often a bit confusing in the beginning.
Let’s look at an example:
<!-- This is a commented block. It doesn't matter how long it is, if it has <h1>HTML elements</h1> in it or if it develops into a few lines, everything between the first less than sign followed by exclamation mark and the last greater than sign is commented out -->
You can use comments in-line too:
<!-- Note about html goes here so you can remember why this is here --> and here it is!
The only thing to consider is that when you see this set of characters
<!-- everything from there is commented out until you see this
-->; these are the opening and closing tag of an HTML element!
Uncomment means to take things out from the comment text: to uncomment the h3 element of the following sentence (which is all commented out):
<!-- <h1>Comment header</h1> <h3>Comment subtle</h3> <article>I am the text of the comment</article> -->
is as easy as:
<!-- <h1>Comment header</h1> --> <h3>Comment subtle</h3> <!-- <article>I am the text of the comment</article> -->
Notice how a closing comment tag (
-->) has been added before the h3 HTML element to match the opening comment tag at the start of the sentence? We also added an opening comment tag (
<!--) after it to match the closing tag at the end; in this way you have created two inline comments (one before the h3 element and one after).
If you want to uncomment everything is even easier:
<h1>Comment header</h1> <h3>Comment subtle</h3> <article>I am the text of the comment</article>
Just remove the opening and closing tags of the comment.
Commments are very valuable because it helps you remember the purpose of a section of code. You can use a many comments as you like. In fact, comments are a sign of careful and thoughtful coding.