&GLOBALn
Thev are all initially set to 1.
be used to communicate between different recursion levels of the
the
determine the number of active arguments in the
&LINENUM
The
and test it.
&READFLAG
buffer (console stack) &READFLAG contains the value
read request results in a line being read from the stack. If not, then
the next read request results in a physical read to the terminal, and
the value of &READFLAG is
variable but you can examine and test it.
&RETCODE
The
recently executed
numeric values (positive or negative), and is set after each
is executed.
changing it is not recommended.
&TYPEFLAG
The
(resume typing) or
terminal display has been suppressed by the Immediate command
contains the value RT when the terminal is displaying output.