You can comment out your notes so
that SASS doesn't read the notes as actual program statements.
The method for doing this, is to include your notes in between a /* and a */.
Here's a note added to our example code.
It's a note to remind ourselves that the data is being subset
to include only past 12 month smokers age 18 to 25.
The note is written in green within the program.
You can be confident that it will not be read as SASS syntax.
You should definitely use this commenting out technique early and
often as you build your own program.
These notes can be very important, because they will help you keep track of decisions
you've made and actions you've taken in writing your code.
At this point, and
whenever you've added something to your code, you should save it.