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Now that you're familiar with HTML and

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CSS as languages let's break down exactly
what you were doing.

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Looking at the code you may have noticed
some grayed out text at

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the top of the page.

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This is called a comment.

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When you run the code this line doesn't
show up anywhere in the browser.

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In the HTML code, comments are created by
using a less than sign,

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an exclamation point and then two dashes.

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You close a comment by putting two dashes
and then a greater than sign.

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Comments are used to put thought or

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explanation into your code for you and
others to understand what's going on.

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Below that you'll see the doc type, or
document type.

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The doc type tells the browser what kind
of document it is, and

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in our case it's plain HTML.

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Including the doc type in the document
ensures that the browser makes

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the best effort to follow the list of
instructions you've created.

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While you were coding you might have
noticed that this attribute is

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not necessary to run you code.

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However, it's good practice and should be
the first thing on an HTML document.

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Next you will notice an opening HTML tag.

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This is a good time to introduce you to
the idea of tags.

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HTML uses tags, which you can think about
as instructions that have

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angle brackets around them, such as
comments or paragraphs.

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When writing tags into your code, be sure
the opening tag has two angle brackets and

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the closing tag has a slash after the
first angle bracket.

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Now that you've learned how to set up your
HTML page and use comments to help you and

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other coders know what's going on inside
your code,

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let's take a quick code challenge on
starting an HTML document and

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a short quiz to make sure you're following
along.