While I agree, I think that's still incomplete. To me good comments have always been about "what is being done AND why". Or to put it another way: to provide t

While I agree, I think that's still incomplete. To me good comments have always been about "what is being done AND why". Or to put it another way: to provide the necessary context for figuring out why a particular piece of code is written the way it's done. (Or what it's supposed to do.)