The ITER operation transfers control from within a DO or FOR group
to the ENDDO or ENDFOR statement of the group. It can be used in DO,
DOU, DOUxx, DOW, DOWxx, and FOR loops to transfer control immediately
to a loop's ENDDO or ENDFOR statement. It causes the next iteration
of the loop to be executed immediately. ITER affects the innermost
loop.
If conditioning indicators are present on the ENDDO or ENDFOR statement
to which control is passed, and the condition is not satisfied, processing
continues with the statement following the ENDDO or ENDFOR operation.
The LEAVE (Leave a Do/For Group) operation is similar to the ITER operation;
however, LEAVE transfers control to the statement following the
ENDDO or ENDFOR operation.