How to print all the defined variables in emacs?

Question

M-x < TAB > prints all the defined functions.

To check a variable is defined or not evaluating the following expression, (boundp \'variable-name) C-x C-e will pr

Answer 1

Extrapolating (heavily!) what is being asked for, here is a way to get a pretty-printed alist of all buffer-local variables with their values. This is very convenient for finding out why for instance a mode isn't behaving the way one expects.

To get this listing, do:

M-x pp-eval-expression RET (buffer-local-variables) RET

Relevant portions from this list can be added almost verbatim to a .dir-locals.el file for use with multiple files.