:h matchpairs
in vim for more info)
0 - last yank
" - unnamed register, last delete or yank
% - current file name
# - alternate file name
* - clipboard contents (X11 primary)
+ - clipboard contents (X11 clipboard)
/ - last search pattern
: - last command-line
. - last inserted text
- - last small (less than a line) delete
= - expression register
_ - black hole register
:.,$d - From the current line to the end of the file
:.,1d - From the current line to the beginning of the file
:10,1d - From the 10th line to the beginning of the file