[plt-scheme] Help with #0 and #0# notation in the REPL

On Mon, Jan 28, 2008 at 07:29:10PM -0600, Robby Findler wrote:
> They are a form of definition and use that you can use in quoted
> constants. In this case, it means that the cdr of that pair is the
> same as the pair itself. The "#0=" is in introduction of the name and
> "#0#" is the use of the name. In general the "0" can be natural
> number.

I can use this in my own code?  It's not just something used for output?

-- hendrik