RETURN: Return from a Procedure Subroutine

 

Form: RETURN
This command tells VISTA that the execution of the current sub-procedure is complete and to return to any calling procedure or to immediate input mode as is appropriate. This command is intended to allow a return from the procedure as a result of an IF test. In cases where no condition testing is needed, the final END command in the procedure buffer will tell VISTA that the procedure has completed.

Examples:

1.
Here is an example of a conditional exit from a procedure. This procedure may be run with CALL or GO.
     LOOP:
        ASK 'Enter non-zero to process another image >> ' TEST
        IF TEST=0
           RETURN
        END_IF
         :
         :
     GOTO LOOP:
2.
END may be used as return ONLY if it is the last command in the file. Thus a procedure like:
     (commands)
     END
may be executed as a subroutine, but one that looks like:
     IF TEST=0
        END
     END_IF
will not work. Use RETURN instead.