Hi !
At every book/tutorial I've read on C/C++ programming language it said that I must start learning DATA STRUCTURE in order to be good programmer, I started to learn it but really weird, once we are programming a program, I mean writing C++ Code and I need stack data structure , then I just need the concept that there's stack and how it works, but there in PC there's not STACK .. it's just a concept that there's something that we can get/retrieve data from and with specific rules....so lets call that stack .. but actually PC doesn't understand in STACK/DATA STRUCTURE .. all about concepts to understand what's going on data structure if I needed to use them while coding .. am I right?

so I can conclude that data structure all about concepts to help me in programming .. no more nothing else .. there's no data structure actually in PC itself, I mean physically on its hardware there's no data structures..