DT
><DD
><P
>        Print a message to standard error.  This is useful for simple
        programs or during prototyping.  The details of the message
        cannot be configured.
       </P
></DD
><DT
><TT
CLASS="LITERAL"
>STOP</TT
></DT
><DD
><P
>        Call <TT
CLASS="LITERAL"
>exit(1)</TT
>, which will terminate the
        program.
       </P
></DD
><DT
><TT
CLASS="LITERAL"
>DO BREAK</TT
></DT
><DD
><P
>        Execute the C statement <TT
CLASS="LITERAL"
>break</TT
>.  This should
        only be use