Say you want to draw a line across the page to break your document into sections. HTML provides an easy way to accomplish this, by means of the horizontal rule.
Here's an example of a horizontal rule:
Here's the HTML code:
<HR>
Very simple! You'll notice that there is no closing tag. The single <HR> tag is all there is to it.
Most HTML elements serve as containers for content. The horizontal rule is one of the few exceptions.
Horizontal rules are block-level elements.