Emacs: how to jump to function definition in .el file?

Question

I tried to edit my init file. Is there any possible way to quickly jump into function definition of other .el file that has already loaded/required ?

I remember doing this once, but don't remember how...

Answer 1

M-x find-function RET (function name) RET

I find that C-h C-f makes a good keybinding for find-function (given that C-h f is bound by default to describe-function)

(global-set-key (kbd "C-h C-f") 'find-function)