Horizontal axis seperate inputs

So I'm begining to start working with an Xbox 360 controller, which is new to me, though coding in unity isn't. This is fine, and is a little different but easy to pick up. However, I currently have a script that works through using the keys A and D in order to get the left and right of the horizontal axis to flip the sprite sheet that I'm using, but I've never needed to deal with the speperate left and right of the axis previously because I just use the above method. Is there a way to differenciate left and right on the horisontal input of the left controller stick?