> ASCII has NUL as well Yes, this is why C-strings can't be used for ASCII, because C-strings can't contain NUL as a character. > You're looking for nil. So i

> ASCII has NUL as well Yes, this is why C-strings can't be used for ASCII, because C-strings can't contain NUL as a character. > You're looking for nil. So it should be four stars? nil isn't a null by the definition this article is using, because it's not a subtype of every reference type.