123 implement a function, say \pcode{env}, that returns all

   123 implement a function, say \pcode{env}, that returns all

   124 assignments from a value (such that you can extract easily the

   124 assignments from a value (such that you can extract easily the

   125 tokens from a value).\medskip 

   125 tokens from a value).\medskip 

   126 

   126 

   127 \noindent

   127 \noindent

   129 string

   129 string

   130 

   130 

   131 \begin{center}

   131 \begin{center}

   132 \code{"read n;"}

   132 \code{"read n;"}

   133 \end{center} 

   133 \end{center}