Clean Code Principles

Clean code is code that another engineer can read, change, and trust without first having to decode it. This lesson covers the principles that produce that kind of code: meaningful names, small focused functions, single responsibility, DRY, KISS, YAGNI, guard clauses, command-query separation, cohesion and coupling, and the common smells to watch for. Beyond surface conventions like PascalCase and file layout, this lesson is about the deeper choices: how to think about what a piece of code is doing, and how to express that intent so the next reader gets it on the first pass.