SYNTAX            : RANGE ; SPACE

RESULTING ARGUMENT: None

FUNCTION          : Exit from val2 levels of iteration immediately if
                    val1 >= 0.

RANGE             : <val 1>,<val 2>
             val1:  Negative:      no operation
                    Non-negative: continue command execution after the
                                  applicable  > .
             val2:  Number of levels of iteration to back out of.

MATRIX