Hi!
As the title says, what happens if i get an address wrong? Do the coins get lost?
If that's what happens, why not change the code in Bitcoin, so that if the bitcoin network cant detect that address, returns the bitcoins to you?
Obviously yes it will get lost if the address that you place is currently existing and you cannot do anything to get your coins back because it is all your fault. You can look at those exchangers that has an email address confirmation to be more secured in transfering your coins.