>Depends on the environment. Are any tables open? If so, could be a field value (though naming a field 'a' would be a very poor choice). In fact, if that's the case, you could have an infinite loop. Or c could be a field and thus the loop have a different termination.
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>>Is this a trick question?

Ah, hadn't thought of the cursor/table with a field with the same name angle. If that's what the question was going for then I'd actually say yes, that's a trick question. I'd expect the code to actually show this cursor/table if it was part of the question.