so, here it goes what i think of each section
Processor Directive, tell the compiler to pull from other codes into the current one for later use.
Main function, where we create, modify and output to the terminal the code, what it is, must be and what must be told to the terminal.
Expression statement, what must be told to the terminal and printed.
Declaration statement, what is created and modified in the code.
Return statement, where it all end, the compiler will end the code here.