The comment example tells what I intend the code to do, in this case provide the sum. Not how it does it. Maybe my example was to trivial to justify a comment I

The comment example tells what I intend the code to do, in this case provide the sum. Not how it does it. Maybe my example was to trivial to justify a comment I agree with that, a proper function name would have sufficed. The main point I'm getting at is the intention. All coding is is a translation of your intention to something machine executable. And often mistakes are made in that. That's why I comment to keep the intention close to the implementation.