At this point, you know that HTML browsers look for the < character
and the > character to indicate tags. But what if you want to
display < or > in your document? To see how, press \ to look
at the HTML source for this document.
You may be wondering at the point how to display & if you
need one, since & is used at the start of the specification for
> and <. Again, look at the HTML source for this document.