Correct format specifier to print pointer or address?

Question

Which format specifier should I be using to print the address of a variable? I am confused between the below lot.

%u - unsigned integer

%x

Answer 1

You can use %x or %X or %p; all of them are correct.

• If you use %x, the address is given as lowercase, for example: a3bfbc4
• If you use %X, the address is given as uppercase, for example: A3BFBC4

Both of these are correct.

If you use %x or %X it's considering six positions for the address, and if you use %p it's considering eight positions for the address. For example: