What is the difference between char * const and const char *?

Question

What\'s the difference between:

char * const 

and

const char *

Answer 1

char * const and const char *?

1. Pointing to a constant value

const char * p; // value cannot be changed

2. Constant pointer to a value

char * const p; // address cannot be changed

3. Constant pointer to a constant value

const char * const p; // both cannot be changed.