func say(name:String, msg:String) { println(\"\\(name) say \\(msg)\") } say(\"Henry\",\"Hi,Swift\") <---- error because missing argument label \'msg\' in ca
Simple:
Wrong call function syntax's( its not same in c/c++/java/c#)
Incorrect:
say("Henry")
Correct:
say(name:"Henry")
PS: You must always! add "name function parameter" before value.