why so messy

An advice for all my programmer friends:

Always code as if the person who ends up maintaining your code is a violent psychopath who knows where you live.

Yes, it's harder to read code than to write it. Please write readable codes. I don't want to end up visiting you in hospital you hear me?

Maintenance programming: Altering progams after they have been in use for a while. Maintenance programming may be performed to add features, correct bugs that escaped detection during testing, or update key variables (such as the inflation rate) that change over time.