Difference between passing by reference and passing by pointers in c++

Question

I've searched the difference but i couldn't understand these items , i can understand about pointers but not reference : can you give an example for them please?

1.
Pointers:
The dereferencing operator * gives the value of the variable.
Reference:
Value can be implicitly referenced using the reference name.

2.
Pointer:
Can point to nothing, null or empty.
Reference:
Has to be initialized during declaration.

3.
Pointer :
Uses ‘&’ to reference the address of variable.
Reference:
Using &, we can get the address of reference (because the address is the same as that of the original variable)

Answer 1

This is what helped me to understand:-
https://www.youtube.com/watch?v=R4iviB8g12A&list=PLRnuLZZ5D0KzAQIanRKPetLl73DoHVn6I&index=2&t=219s

Answer 2

Coder Kitten
rodwynnejones

Thanks for a million. You healped me alot.