な indicates emotion
Japanese
綺麗な星だなあ
English
な indicates asking another person's agreement
Japanese
寒いな
English
な indicates soften the effect of an assertion
Japanese
あの映画はあまりよくなかったな
English
な indicates soften a command or request
Japanese
駅まで行ってくださいな
English
な indicates a prohibition
Japanese
あいつに会うな
English