In English it is polite to ask
How are you?
What's up?
How do you do?
after a greeting. The answer of course is always something like
Thanks, I'm fine.
Not much
Complaints about personal mischiefs are considered inappropriate.
What are corresponding modern French salutations in
- formal settings
- in an informal setting
- amongst young people
- amongst close friends
- online chat
What answer is expected on such a question?