@unknownuser said:
Well, for start, you could type in lowercase Because if your variable name starts with capital letter, ruby takes it as CONSTANT. You are lucky that ruby lets to redefine constants, most of programming languages don't allow . This is why you get the warning.
use something like this, it's easier to read and those are local variables, not constants:
> x_size = input[0].to_f
> y_size = input[1].to_f
> z_size = input[2].to_f
>
Thanks! it works perfectly now!