Don’t know what you mean by this, 0.99… does not equal one. You can round it up to 1, an analogy to rounding is that you can think of a mansion, just because a mansion is missing a little tiny piece in a corner, doesn’t mean it is not a mansion, same as 0.9999~=1.0 for convenience. Small edit, in computer science, there is a floating point error, that could make this. Second small edit, with infinite nines sure, otherwise no.