Al,

The problem with not using EXIT for your code is you have written the condition code twice. If that is a complex expression there is a significant chance that the code will be editted in one place and not the other, yielding a hard to find bug.

IMHO, I prefer simplicity in code and early exits/loops are sometimes the best choice. Duplicated code should be avoided at all costs.

>>

>< ensure condition true >
>while < condition >
>  < some code >
>
>  if < condition >
>    <b>* No further processing required</b>
>  else
>    < some other code >
>  endif
>enddo
>>

Note the explicitly added comment. This tells the reader that the alternative branch was considered, and provides a pre-built entry point if and when the business logic is modified in the future.
>
>In my maintenance programming experience, failure to consider the alternate branch causes some of the most subtle and hard-to-find bugs.