"All pointers share the same data type - a long hexadecimal number..."

Question

Please explain that line from the course.

Answer 1

all locations of variables are made of a long hexadecimal number. (i.e. 0x12345678)
pointers contain locations of variables.
so pointers contain a long hexadecimal number.

Answer 2

the pointer contains this lonely information : the address to the pointed element. In programming, addresses are not string like "3rd street, lovely blue house n°42, San Fransisco" but numbers. hexadecimal is just a trick to display that number being the closest to binary but in a shortest way. "Long" is for being less limited than just "int".

Answer 3

Oh! Thanks.