Question

I need a rounding function that returns a larger integer when the input is positive and the a smaller number when negative, i.e. it should not return 0 unless the input is actually 0.0.

Examples:

f(0.1) = 1
f(-0.1) = -1
f(0.0) = 0

(The Math.ceil() function always rounds up, so Math.ceil(-0.1) = 0

Answer 1

How about

rounded = Math.ceil(Math.abs(toBeRounded)) * Math.signum(toBeRounded);

That rounds the absolute value of your number up, then re-applies the signum.