When it comes to functions, there are a few things you need to know. First, a function is a block of code that performs a specific task. Functions are written in the same language as the code that calls them. Second, functions can take arguments and return values. Arguments are pieces of data that are passed into a function, and return values are the results of the function’s execution. Finally, functions can be defined in two ways: inline or standalone. Inline functions are written directly in the code where they’re called, while standalone functions are written in their own separate file.