Yep, this type of code is known as polymorphic virus - a virus that can change its inner state or behavior.

For more information: https://bit.ly/2zo5yg6

Dear Sabri Erdem

You ask: " Is it possible (OR will it be possible) that a code is able to change itself (at least a line of code)? "

My answer: Of course; all that is needed to impel change(s) is noteworthy aspects of the naturally changing environment that will be encountered (and detected as changing) by the machine, as a matter "of course" (and similarly for humans). With clear impetus, code can be written to do anything in some sensible way -- even change itself.

All this should already be possible, but crude in its foundations (and thus, in any thorough analysis, it will be seen to be crude and clearly and greatly limited, until we learn more about human development (ontogeny)). Check out my AI Project for a forward-looking vision:

https://www.researchgate.net/project/Developing-a-Usable-Empirically-Based-Outline-of-Human-Behavior-for-FULL-Artificial-Intelligence-and-for-Psychology

P.S. There need NOT (and should NOT) be any "central executive". Do not "believe in" that OR believe any such thing is necessary. It is the homunculus and is bad (false and ruins things), in both theories of humans and in anything having to do with real AI.

The trivial answer is yes since assembler can modify itself during execution. The issue is change itself and obtained an intended behavior.

I wrote self-modifying code three decades back on a programmable pocket calculator. So it's possible, of course. And if you take a language like Lisp, you have all the machinery to self-modiable code at your finger tips. The more meaningful question is: when is such a behaviour preferable to "classic", static code?

I think self-adaptive programming methods can be very useful for heuristic algorithms. Changing output parameters with input parameters through iterations would make the algorithm more adaptive. Take a look at our related work:

BTW, we call it "self-modifying code" (https://en.wikipedia.org/wiki/Self-modifying_code) but also "self-programming" is often used (https://www.cio.com.au/article/576144/ai-machines-self-programming-next-phase-computer-science/).