I'm not sure I agree; aren't dest and src still variables that are being stepped up? Maybe they are not "controlled variables", I don't know what that means. Th

I'm not sure I agree; aren't dest and src still variables that are being stepped up? Maybe they are not "controlled variables", I don't know what that means. This is a task that is eminently suited to repetition, any loop makes sense. Plus, the article mentions FORTRAN's DO loop (not just for loops incrementing a counter). I was expecting an example where a loop worked, but a simpler mathematical solution exists without a loop. Anyone else?