Learn Python the Hard Way: A Deceptively Simple Introduction to the Terrifyingly Beautiful World of Computers and Data Science, 5th Edition

Exercise 2

Comments and Pound Characters

Comments are very important in your programs. They are used to tell you what something does in English, and they are used to disable parts of your program if you need to remove them temporarily. Here’s how you use comments in Python:

Listing 2.1: ex2.py

Click here to view code image

1   # A comment, this is so you can read your program later.
2   # Anything after the # is ignored by python.
3
4   print("I could have code like this.") # and the comment after is ignored
5
6   # You can also use a comment to "disable" or comment out code:
7   # print("This won't run.")
8
9   print("This will run.")

From now on, I’m going to write code like this. It is important for you to understand that everything does not have to ...