 These representations are unique, except that numbers (mentioned above) with a terminating expansion also have a non-terminating expansion, as they do in base-10; for example, 1 = 0.99999….In the following example the notation 1 is used to represent −1.211.01φ is not a standard base-φ numeral, since it contains a "11" and a "2", which isn't a "0" or "1", and contains a 1 = −1, which isn't a "0" or "1" either.