Is $0.\overline{0}1$ a valid repeating decimal?

Question

Surprisingly, I never came across a repeating decimal, which did not include the last digit, so I'm wondering if this would even be a valid notation?

$$0.\overline{0}1$$

So the following statement would be true?

$$1 - 0.\overline{9} = 0.\overline{0}1$$

Thanks for clarification.

Answer 1

No, it's not valid; if we specify any digits after the repeated sequence, the sequence has to repeat a specific, finite number of times. Also, note that $0.\overline{9} = 1$, so $1 - 0.\overline{9} = 0$.