Another useful thing to know is how to write "comments", which are words that the computer won't see when running your code. Comments are visible to humans only, and can be used to write notes and labels to make your code more easy to understand. Comments start with the "#" symbol, which makes the entire line a comment. Try writing your own below! (Note: CodingBat always requires a "return" statement for each problem, so don't forget to add "return" on a separate line after your comment.)