Confusion with functions!

Question

When two or more calling functions calls the same function, does the function behaves the same to every calling function.
If the calling function change the initial values of the function, does it affects the another calling function?
#rip_bad_english_sorry! 🤐😝

Answer 1

yes, it behaves the same
no, it doesnt affect another calling function
p.s. sorry for bad english

Answer 2

this call function overriding.. when 2 or more functions have same name but different parameters or different return value, it's called function overriding..

Answer 3

what happen?