How do you say hello in Devanagari?

Ballsex

then you say how are you

Hello in French is BonjourHi in French is SalutHow are you is Ca vaBye in French is Arivoir

To be respectful and not considered rude, I would say Hello back and ask a simple question like How are you? Or How is your family? Or How was your day? Or something like that. ;)

Oláyou can also say Oi which means hi.