He answered (the question) 'in the affirmative'. [=he said “yes”]
She gave an 'affirmative' answer, not a negative answer.
She answered (the question) 'affirmatively'.
(..) The signal works. It's beautiful. BARNES: Commander Ashdown's on. ASHDOWN : Connor, tell me it works. JOHN: It works. That is affirmative. The signal works. Good. The attack commences tomorrow at , worldwide. Your unit will be in support of the bombing of Skynet Central. (..)2009 Terminator Salvation