Why is different specifier used to print out address of variable and pointer some use %x, %u i need clarity please.?

Answer 1

And C has a little trick.

%X for uppercase.

E.g.: 0x10A

%x for lowercase.

E.g.: 0x0e

Answer 2

%u is the format specifier used for unsigned integer (decimal)

%x it's for hexadecimal number

Some ppl prefer hexadecimal for memory address: the output is more compact and clear...