VERY simple question from a complete newbie.

Hello,

So, I'm a complete newbie to coding. My experience so far is about 2 weeks doing Python in Code Academy. I downloaded Pycharm recently, and for the most part, anything that I do in code academy can be transferred directly over, and it works, save for this ONE thing. Please forgive me for not indenting. 

num = 1

while num < 11:
print num**2
num += 1

Pycharm seems to hate this, and throws the error "unsupported operand type(s) for ** or pow(): 'NoneType' and 'int'"

Now, from what I've gathered, it doesn't like the fact that I'm trying to add a word to an integer, essentially, right? It throws the same error when I do anything else like that as well, for example:

variable = 10

print variable + 2

I've tried telling Pycharm that the number is an integer, but no matter how I try to code it, it doesn't seem to want to work. 

Any help on this would be very greatly appreciated!