Comments are explanations to the future maintainers of the code. Even if you’re the only person who will ever see and touch the code, even if you’re either immortal and never going to quit, or unconcerned with what happens after you leave (and have your code self-destruct in such an eventuality), you may find it useful to comment your code. Indeed, by the time you revisit your code, weeks, months or years later, you will find yourself a different person from the one who wrote it, and you will be grateful to that previous self for making the code readable.

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