""" can't behave like this, because it won't be able to include """ itself in the string. The """# case is handled by using more #s: ##""" in string """#

""" can't behave like this, because it won't be able to include """ itself in the string. The """# case is handled by using more #s: ##""" in string """# still in string """## // out of string Swift has two types of string "..." and """...""", either of which can have zero-or-more # at the start and end.