Emacs, describe-key Command, C-h k

Question

When I want to find the command bound to C-u M-. using C-h k, it turns out that emacs gives me the command bound with C-u. What should I do ?

Answer 1

C-u is provides a prefix argument to the function called after it (as you can see from its docs). Access the documentation for M-. and then look there for what happens when the function receives a prefix argument. There's no separate documentation for C-u M-. since it is not separate function.