2.2 Function Program Computing

2.2 Function Program Computing

 

In chapter 1, we know that function programs use an immutable data structure to represent the state of data. The function method that makes everything immutable not only affects the data structure (class in C #), but also extends to local variables.

We will not be surprised if you want to ask what the program can do when everything is changeable. Simply put, a function program is represented by computation instead of a statement that can change the state. In this section, we will reveal this computing method, but first look at a simple code that uses variables.