Doubt in pointer

Question

I have recently learnt concepts of pointers in C++ and I have found,
in few programs, to assign a pointer to the address of a variable, sometimes they use the line of code - int *p = &num ;
and sometimes they use - int p = &num ;
So are these lines of codes equivalent and the placing of asterics sign is insignificant? Please help me have a clear idea.

Answer 1

You cannot do

int p = #

The address of num can only be stored in a pointer. I suppose you mean:

int& p = num; ?

Answer 2

https://code.sololearn.com/cFK8o7i1XKyh/?ref=app
Check this out. I think its clear enough.