Alright I'm a bit confused when looking at how range works. I'm reading lesson 4.3 in the python tutorial. http://docs.python.org/tut/node6.html I came across this: >>> range(-10, -100, -30) [-10, -40, -70] How come it prints on -40 or -70. Does -70 come from -70 -> -100? This is really confusing me.