Creating computed properties and understanding how they work

Imagine that every time you have to fetch manipulated data, you need to execute a function. Imagine you need to get specific data that needs to go through some process and you need to execute it through a function every time. This type of work would not be easy to maintain. Computed properties exist to solve these problems. Using computed properties makes it easier to obtain data that needs preprocessing or even caching without executing any other external memorizing function.