7.0

SYNTAX            : ARG @M

RESULTING RANGE   : Depends on ARGUMENT, see there.

FUNCTION          : Return information about the argument, range or list
                    the current macro was called with. The ARGUMENT decides
                    what information is generated. This command is only valid
                    within a macro; any other use will generate an error.

ARGUMENT          : Which of the three possible parameters to return
                    information for:
                    1 : Returns whether an argument, range or list was present 
                        in the call to M or not (first returned value of the 
                        RANGE is 1 if so, 0 if not), and the value of the 
                        ARGUMENT (or of the first value of the RANGE or LIST 
                        if applicable) as second value of the returned RANGE. 
                        If returned value 1 is 0, the second value does not 
                        mean anything (it will be 0, but not valid).
                    2 : Returns whether a range or list was present in the 
                        call to M or not (first returned value of the RANGE 
                        is 1 if so, 0 if not), and the second value of 
                        the RANGE or LIST (if applicable) as second value of 
                        the returned RANGE. If returned value 1 is 0, the 
                        second value does not mean anything (it will be 0,
                        but not valid).
                    3 : Returns whether a list was present in the call to M or 
                        not (first returned value of the RANGE is 1 if so, 0 
                        if not), and the third value of the LIST (if 
                        applicable) as second value of the returned RANGE. 
                        If returned value 1 is 0, the second value does not 
                        mean anything (it will be 0, but not valid).
                    Other values are not allowed. 

EXAMPLE           : 3 @m=
                    Will display a range, depending on how the active macro was
                    called. Remember, that this must be code inside a macro. If
                    that macro was called with, say, 7,8,9 , the output will
                    be 1,9 .

NOTE              : As soon as this command is encountered in a macro, the
                    macro will no longer see its argument as a number of times
                    to execute. It will execute just once. However, the loop
                    can be programmed back in easily via the @M command:
                    2 @M U12 Q1 < Q2 < ... > >

MATRIX