How To Fix Error: character "<" is the first character of a delimiter but occurred as data

You validate your site with W3C validator and you find this remark: Error: character "<" is the first character of a delimiter but occurred as data

This is how you fix this error.

1. Click on the number after the word Line.

2. It will show you exactly where is the problem.

3. Wrap the problem code with these two JavaScript as shown below:

<script type="text/javascript">
//<![CDATA[

(here is your problem code)

//]]>
</script>

4. If it is WordPress theme, click the blue Update File button. If it is a Blogger template, click the orange Save template button.

That's all. Isn't it easy?