Exercise 18: Names, Variables, Code, Functions

Big title, right? I am about to introduce you to the function! Dum dum dah! Every programmer will go on and on about functions and all the different ideas about how they work and what they do, but I will give you the simplest explanation you can use right now.

Functions do three things:

  1. They name pieces of code the way variables name strings and numbers.
  2. They take arguments the way your scripts take argv.
  3. Using 1 and 2 they let you make your own "mini-scripts" or "tiny commands."

Ready To Learn To Code?

If you enjoyed the sample so far, then you can continue learning by purchasing Learn Python 2 The Hard Way, or Buying Learn Python 3 The Hard Way for 29.99. You'll receive all 52 exercises in PDF and HTML formats, plus videos teaching you each exercise. This course has helped 12 million people learn to code since 2010, so it can help you too. If you want to see more samples then try the Appendix A: Command Line Crash Course. If you already purchased this book then you can download the videos at account page or view the paid HTML version.

Need To Learn For Free?

My Learn Ruby The Hard Way is still free to read for anyone who needs to learn to code. Ruby is a perfectly fine alternative to Python, and works just as well as a first language. If you can't afford Learn Python The Hard Way then read Learn Ruby The Hard Way for free.

Buy The Python 2 Course

When you buy directly from the author, Zed A. Shaw, you'll get a professional quality PDF and hours of HD Video, all DRM-free and yours to download.

$29.99

Buy The Python 2 Course Buy The Python 3 Course Instead

Try a free sample of Learn Python the Hard Way right here, video lectures not included.