Is there a formula to increment by 0.1 to an alphanumeric code in Excel, and then repeat the pattern?

Question

I\'m trying to make a column going all the way down like this:

C00 C00.1 C00.2 C00.3 C00.4 C00.5 C00.6 C00.7 C00.8 C00.9 C01 C01.0 C01.1 C01.2 C01.3 .... C01.9 C02 C02.0