[ragatskynet]

Code quality means a lot in my opinion. A nicely structured and organized code not only shows its programmers' expert skills but makes it easier (and faster!) to modify or extend the present functionalities. Also if you care about code quality it really helps you to develop your skills.

As others stated it is needed to start a project in a way that you care about the quality. Even when there have not been a single line written. Also being agile also means that you refactor and redesign from time to time when it is needed.

I always check my code after implementing a functionality. If it is needed, I refactor my code. Also there are numerous tools to check code quality (e.g. Sonar). A very good approach is to have code reviews as well if you can.

There is a very nice book in this topic which the others have not mentioned, but if you are interested I advise to read it: Clean Code by Robert C. Martin.