What does it mean to 'debug' code? Is there a real insect inside?

Actually, the term comes from an old story about a real moth stuck in a computer relay, but today, 'bugs' are just mistakes in our logic. Think of it like finding a bad spark plug in a Keke NAPEP.

The engine won't start correctly because one small part is faulty. Debugging is the process of being a detective. You look at the symptoms, trace the steps, and find where the logic went wrong.

I tell my students: don't be frustrated by bugs. Every bug you fix is a lesson you've learned. Even after 15 years, I still create bugs. The difference is I've gotten better at hunting them down!