Branches to and returns from a subroutine.
 
GOSUB line1
.
.
.
RETURN [line2]
 
    - line1    The label or line number of the first line of the subroutine.
    - line2    The label or line number where the subroutine returns.
 
    - If you don't supply a label or line number for RETURN, the program
      continues execution at the statement following the GOSUB (for
      subroutine calls) or where an event occurred (for event handling).
      See the <ON> keyword for information about event-handling statements.
    - SUB and CALL statements provide a better alternative to GOSUB
      subroutines.
 
Example:
    FOR i% = 1 TO 20
        GOSUB Square
    NEXT i%
    END
 
    Square:
    PRINT i%, i% * i%
    RETURN
 
See Also    <CALL>    <ON KEYWORD>    <ON...GOSUB>    <SUB>