ruby - Round up instead of down when below zero -

it seems ruby chooses round negative numbers down instead of closer zero.

-1.5.round #=>-2 

whereas positive numbers work other way:

2.5.round #=>3 

how round negative numbers(closer zero) instead of rounding them down? i'm using ruby version 2.2.2.

this should work.

> (-1.5+0.5).floor => -1 > (-1.4+0.5).floor => -1 > (-1.6+0.5).floor => -2