In HTML
, XHTML
, XML
, the <!--
starts a commentary scope and -->
finish it. It is a comment and it does not affect the result on the browser, but add some bytes on the response.
<!-- comment some text
and you can break lines.
It is compatible for html, xhtml and xml.
-->
On other languages you have other sintaxes for comments, for sample:
/* this is a comment for C, C++, C#, Java, Javascript, CSS, etc.
you can break lines */
// this is a single line comment for C, C++, C#, Java, Javascript.. you can't break lines here
See more about comments if you want on this link.
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