I was under the impression that ciao means 'hi/bye' in Italian, which is more informal, and then arrivederci means 'goodbye' and buongiorno can mean 'hello/good morning' which are both more formal than ciao, I've only been learning Italian for a couple of weeks so correct me if I'm wrong but that's what I thought.
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Am I right in assuming that saying 'ciao' would be similar to an informal 'hello' or 'bye' to friends/family, and that 'arrivederci' would be the equivalent of saying "good-bye' to someone, such as a boss or some one you don't really know?
Following this, when would 'salute', 'salve' and 'addio' be used? I'm trying to understand properly, Duolingo doesn't really go into detail.