TITLE: How to round 0.45? Is it 0 or 1?
QUESTION [5 upvotes]: This question is inspired by How to round 0.4999... ? Is it 0 or 1? I didn't quite understand the logic of the answer. It seems you round every decimal place no matter how far back it goes? In the case of 0.49999, you're rounding up the 9 increases which causes the .4 to be .5 making it round up to 1 (rather than down).
So 0.45 will rounds to 1? Would .444444444444444444444444444449 also round to 1?

REPLY [2 votes]: It is definitely 0, since it is less than 0.5. But in these cases i would not round to 0, since it might make the solution meaningless. It all depends from the problem's scope and you instructor (or the environment).