In the last German micro tutorial, we learned "hallo" as an informal greeting. Of all the informal greetings, this is probably the most formal one. Other informal greetings you can use in Germany are:
Hi!
Hey!
or
Servus! (Bavaria only)
Say it with me!!
"Welt"-Ballon in Berlin Mitte. Please do not buy the newspaper this balloon is advertising for ;) Still a great view though.
