150 words or more. Please use and site at least two references below.

What are the basic instruction (statement) categories in programming languages?
What are the functions? Where do you get them and how do you use them

 
Downey, A. (2014). Think Python: How to Think Like a Computer Scientist. Retrieved August 6, 2014, from http://www.greenteapress.com/thinkPython/html/index.html
Swaroop, C. (2005). A Byte of Python. Retrieved from August 6, 2014, from (http://www.ibiblio.org/g2swap/byteofPython/read/index.html)
Hetland, M. (n.d.). Instant Python. Retrieved August 6, 2014, from http://hetland.org/writing/instant-Python.html
Hetland, M. (n.d.) Instant Hacking. Retrieved August 6, 2014, from (http://www.hetland.org/Python/instant-hacking.php)