While writing content use these html tags

To give line break use <BR>

To give subheading use para headings or use like this <2> sub heading </h2>, no need to give extra line break before or after using <h2> tags

To write code use like this , no need to add extra <br> tags to give line break here as these are inside <pre> tags

<pre><code>$name='My Name';
$class='Four';
$email='sample@example.com';</code></pre>

Use <i>for Italic</i>

Use <b>for bold</b>

Use <a href=page_name.php>Next page details</a> for linking