ITERATE – Proceed to the next iteration of current loop
Use the ITERATE command to exit
the current iteration of a DO block, and resume
processing at the DO statement.
ITERATE
If this is a repeat or iterative loop, the loop counter is incremented.
If this is within a Block DO structure, the
block is exited, and the ITERATE applies to
the nearest loop DO structure above.
The ITERATE command applies only to the
currently active DO loop, you cannot ITERATE a
higher-level nested loop structure this way.