Labels mark a point in the program so that execution may be directed there with a goto command. An association is made between a label and the next command encountered after the point where the label is defined. Each label can be any string of alphanumeric or `_' characters (up to length 40). Any label which is referenced by a goto command must, of course, be defined, otherwise a fatal error results. Some examples follow:-
goto big_event .. big_event: call ftt
goto 1 .. goto 2 .. 1: call ftt 2: call out(1)