Form Follows Function, Function Follows Form.

Form follows function. We often here this term regarding designs and most notably in the modern architectural field. But what is it exactly? According to the site Wikipedia, 'Form follows function' is the principle that shapes a building or an object primarily based upon its intended functions or purposes. This simply means that the practicality (usage) of the building or object is more important than the aesthetic
(design) values.

Function follows form on the other hand is a total opposite of the concept mentioned in the above paragraph. The aesthetic value of a building or an object is put first rather than the practicality. For example, a building might look majestic, futuristic and grand to one's eye, but in truth the function of the building would be just as similar to a building that has none whatsoever aesthetic values.