Formal:
* Bonjour: This is the most common and versatile greeting, used in all situations where you are addressing someone you don't know well or who is older than you. It's appropriate for both morning and afternoon.
Informal:
* Salut: This is a more casual greeting, suitable for friends, family, and people you know well. It can be used throughout the day.
* Coucou: This is a very informal greeting, often used by friends and family, especially children. It can be translated as "peek-a-boo" or "hello there."
Other options:
* Bonne journée: This means "good day" and is a polite way to say goodbye in the morning or afternoon.
* Bonne soirée: This means "good evening" and is a polite way to say goodbye in the evening.
* Bonsoir: This means "good evening" and is a polite way to greet someone in the evening.
It's important to note that French culture places a strong emphasis on politeness. When in doubt, it's always best to err on the side of formality.