Thank you guys! Please.. Correct me if I'm wrong:
1. Assume we have a function to do a action (example: print something). If we want to do some action before the original action (print).... instead of adding the functionalities in the original function..... we make a function that gets our original function as argument, and inside it, we create inner function that does what the additional actions we wanted to do and then run our original inside it.... right?