Imperative programming is easy to understand: it is simply a list of commands, like this:
(
var a, b, c;
a = 12;
b = 25;
c = a + b;
a.postln;
)
Declare the variables, set the variables, do a calculation, and print the result of the calculation. This is a simple example, and a simple model, but it is very difficult to escape completely. After all, humans think of large problems in terms of algorithms (the instructions needed to do something). Computers solve large problems, so being able to program them with a series of instructions makes sense.