C++ Hello World looks simple, but every line is doing real work. In this video, we break down the classic first C++ program line by line — what #include iostream actually pulls in, why we use namespace std, what int main really means to the operating system, how cout sends text to your screen, and why return 0 matters.
If you're starting out with C++ or coming from another language, this walkthrough gives you the mental model behind the code instead of just the syntax. We cover the standard library, namespaces, the main function as the program entry point, the insertion operator, standard output, and exit codes — so the next program you write actually makes sense.
