Example
To break loops, the command EXIT can be used.
DO.
READ TABLE itab INDEX sy-index INTO DATA(wa).
IF sy-subrc <> 0.
EXIT. "Stop this loop if no element was found
ENDIF.
" some code
ENDDO.
To skip to the next loop step, the command CONTINUE can be used.
DO.
IF sy-index MOD 1 = 0.
CONTINUE. " continue to next even index
ENDIF.
" some code
ENDDO.
The CHECK statement is a CONTINUE with condition. If the condition turns out to be false, CONTINUE will be executed. In other words: The loop will only carry on with the step if the condition is true.
This example of CHECK ...
DO.
" some code
CHECK sy-index < 10.
" some code
ENDDO.
... is equivalent to ...
DO.
" some code
IF sy-index >= 10.
CONTINUE.
ENDIF.
" some code
ENDDO.
