What is hello and goodbye? - basic phrases for this would be helpful
For "salut" it's without the e :-)
Basic sentences for saying hello are usually:
"Salut, comment ça va?" - Basically: "Hi, how are you?" to a friend, or at least a person you know better, who is not an "authority" to you, as your boss, or teacher, etc.
A nice way to respond if someone asks you exactly this, is simply "ça va", stating that everythings good.
"Bonjour, comment allez-vous?" - "Hello, how are you?" in a formal version.
To say goodbye, you can also say "salut" again, if the person you're talking to is a friend, but also "à la prochaine" or "à bientôt" for "see you next time/see you soon", or "à plus tard" for "see you later".