Programming Challenge Numbers to Text?

[plug.org at 2nerds.com]

On Fri, 5 May 2006, Shane Hathaway wrote:
> Still, the fact that it's a language feature rather than a library function
> looks like a mistake to me.

AFAIK, the format function _is_ a library feature; common lisp just 
happens to include a huge library as part of the "standard" language 
specification.  The "Common Lisp HyperSpec" is a good online reference for 
the language and the library.

To learn about the format function generally, start here:

  http://www.lisp.org/HyperSpec/Body/fun_format.html

For more detail on the various formatting options supported by the 
"format" function (love it or hate it), start here:

  http://www.lisp.org/HyperSpec/Body/sec_22-3.html

For information on the "~R" option specifically:

  http://www.lisp.org/HyperSpec/Body/sec_22-3-2-1.html

Chris