round

Prelude> round 0.5
0
Prelude> round 1.5
2
Prelude> round 2.5
2
Prelude> round 3.5
4

WHAT THE FUCK

>>11
Disregard that, I suck cocks. I just read about round-to-even for the first time.

But still, if they're using that they should at least document it. The reference manual just describes the round function as "round x returns the nearest integer to x".