what's DRY?

Answer 1

DON'T REPEAT YOURSELF. That's a very important principle for coders, as you don't want to write code over and over and over..... again. There's a reason for OOP, classes, modules etc because they can help make applications more dynamic - components; where you just include or import once and pass relevant data to them if necessary, and you don't have to write new code to make it work because you'll already have that.

Answer 2

it's the antithesis of WET, or "We Enjoy Typing" ☺