CHECK behaviour??

Question

Hi Experts,
Pls. clarify my basic doubt that, Wht is CHECK behaviour in the folllowing scenarios?
1) LOOP
check not my_itab[] is initial.
endloop.
2) form_1
check not my_itab[] is initial.
endform.
3) Main Prog. blocks
check not my_itab[] is initial.
logic...
4) Is END-OF-SELECTION triggers, if CHECK is true i.e. my_itab does hv records?
1) IF
check not my_itab[] is initial.
endif.
thanq

Answer 1

CHECK evaluates the subsequent logical expression . If it is true, the processing continues with the next statement.
In loop structures like
DO ... ENDDO
WHILE ... ENDWHILE
LOOP ... ENDLOOP
SELECT ... ENDSELECT
CHECK with a negative outcome terminates the current loop pass and goes back to the beginning of the loop to start the next pass, if there is one.
In structures like
FORM ... ENDFORM
FUNCTION ... ENDFUNCTION
MODULE ... ENDMODULE
AT
CHECK with a negative outcome terminates the routine or modularization unit.
If CHECK is not in a loop or a routine or a modularization unit, a negative logical expression terminates the current event. In contrast, the statement REJECT terminates the current event, even from loops or subroutines.
Regards,
Santosh