Can you understand this sentence for java programming?

Question

Here is the text.
------------------------------------------------------------
There are four comparison operators:

< less-than
> greater-than
<= less-or-equal (i.e. ≤)
>= greater-or-equal (i.e. ≥)
There is overlap between these, since we could use less-than to write something like (aa). It makes no difference to the computer. We will prefer the version which reads most naturally.
-------------------------------------------------------------
What is mean by the last paragraph? How we could use less-than to write (aa)?

Answer 1

That doesn't make any sense. The text was probably auto-copied from a PDF and was obviously misread. The original PDF is linked below. It says "a<b" instead of "(aa)".

Source (PDF warning):
https://web.stanford.edu/class/archive/cs/cs108/cs108.1082/106a-java-handouts/HO32IfBoolean.pdf