For me the main difference between pointers and references is that pointers are variables and references are values.
the same way that num in int num = 5 is a variable and 5 is a value.
Pointers are a variable type that contains an address and there is a subtype for each type because each type is defined by a memory size.
A reference is a value of type memory address.
So that’s why you can do int * number = #
