Why does round(5/2) return 2?

Question

Using python 3.4.3,

round(5/2) # 2

Shouldn't it return 3?

I tried using python 2 and it gave me the correct result

round(5.0/2) # 3

How can I achieve a correct rounding of floats?

Answer 1

if two multiples are equally close, rounding is done toward the even choice (so, for example, both round(0.5) and round(-0.5) are 0, and round(1.5) is 2).

Quoting the documentation for the round function. Hope this helps :)

On a side note, I would suggest always read the doc when you face this kind of question (haha)