Preprocessor Directive: A preprocessor directive is a line of code that will run before all of the code that you write. The # symbolizes the preprocessor directive.
Main Function: The main function is the function that holds all of your primary lines of code that will be run for each level.
Expression Statements: Expression statements are expressions that are followed by a semicolon to signal either a phrase you want to be said or to express what has been declared.
Declaration Statements: Declaration statements are statements where you declare variables and other products of your code.
Return Statement: The return statement is what symbolizes the end of that function
