🚀 go-pugleaf

In article <1jpnnsINN5el@retriever.cs.umbc.edu> finin@cs.umbc.edu (Timothy Finin) writes:
>Is there a way to define an environment in LaTeX that takes a single
>optional argument?  I have the following definition for an environment

Many LaTeX commands have optional arguments. Look for any one of them
in latex.tex and you will find your answer. The usual approach is to
use \@ifnextchar, as in 
 \def\nopagebreak{\@ifnextchar[{\@nopgbk}{\@nopgbk[4]}}

Remember, if you put such a def in the source file (as opposed to a style
file to be used in the \documentstyle-line), then do
 \makeatletter
 <new definitions>
 \makeatother

--darrel