Explain the code so far

[nguyenar117]

Preproccessor Directive is we are importing files that has tools we can use for our code

Main function: Is the first execution in our code

Expression statement: Is something a printed statement to be displayed in the terminal

Declaration statement: Is where we can declare values or change them

return statement: is the end of our main() execution which returns a value of 0

[beegeedee]

The #include preprocessor directive does exactly this but there are a number of other directives as well.
The main purpose of them is to give the compiler instructions to be executed before it compiles, like including code, defining constants, and even exclude code when certain things are not defined.