Welcome back! In this video, we're going over the code we wrote in the previous video, explaining what each line of C++ does and why they are necessary. More specifically, we're going to be mainly talking about the "main" function and why you need to define that function in your code. Once again, I would recommend reading the links below for extra information that will help you understand our simple CPP program: the simplest c++ program - https://matgomes.com/dissecting-the-simplest-cpp-program/ previous video on creating the simplest CMake/C++ program - https://www.youtube.com/watch?v=2NE4_9txs2Q