RETURN – Exit the subroutine
Use the RETURN command to exit
the subroutine and return the processing to the instruction that follows
the CALL command.
When multiple subroutines are defined, a RETURN statement
is automatically assumed when the next SUBROUTINE statement
is encountered. When the last statement in SYSIN is reached, a RETURN is
assumed if a subroutine is being defined at that point.
A RETURN statement encountered outside
a subroutine is treated like an EXIT statement.