Most programming languages also allow “comments,” which are pieces of code that the computer will ignore. These comments allow the person writing the code to leave a note to future people reading the code, knowing that the computer won’t read it (like an aside in a play).
Especially with the collective knowledge that is made accessible through the Internet, the ability to efficiently add and remove comments seems important for the human aspect of programming languages. Particularly in cases when the code tries to incorporate even more complicated directions.