@SamanthaQuan

Beautiful is a degree above the good. Beautiful in the context applied defines the refined, with a nuance of excellence.
As the definition of beauty is not standard, it is what appeals to an individual. It is not only about passing the functional quality test, it is about perfection. 

Fields of application varies. A mathematician might, after going through some derivations express : "Beautiful !"

The dictionary here
https://en.oxforddictionaries.com/definition/beautiful

defines it as
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1Pleasing the senses or mind aesthetically.

‘beautiful poetry’
‘a beautiful young woman’

1.1 Of a very high standard; excellent
‘she spoke in beautiful English’
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The word beautiful hints to the fact that code authorship or software craftmanship is an art, a science. It presumes that as time unfolds itself, masters must be produced to further excellence. It encourages high standards.

Abdur-Rahmaan Janhangeer
Mauritius