(but they work)
That is a first step!
Only then comes: "Is it easy to maintain", "is it efficient" and "is it elegant".
After a while you will recognize that really these four matters are aspects of the same and you will then write programs that show all aspects all the time together.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
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