Here are some other ways to say hello, depending on the context:
* "Bom dia" (good morning) - Used from sunrise to noon.
* "Boa tarde" (good afternoon) - Used from noon to sunset.
* "Boa noite" (good evening/good night) - Used from sunset onwards.
* "Tudo bem?" (How are you?) - A more informal greeting, similar to "Hey" or "What's up?"
* "E aí?" (What's up?) - Even more informal and slang-like.
The best way to greet someone in Portuguese depends on the time of day, your relationship with them, and the formality of the situation.