Comment functions so powerful—no comment necessary.

1. Add Plug 'scrooloose/nerdcommenter' to your vimrc file.
2. Reload your vimrc or restart
3. Run :PlugInstall

1. Add Plugin 'scrooloose/nerdcommenter' to your vimrc file.
2. Reload your vimrc or restart
3. Run :BundleInstall

1. Add NeoBundle 'scrooloose/nerdcommenter' to your vimrc file.
2. Reload your vimrc or restart
3. Run `:NeoUpdate``

cd ~/.vim/bundle
git clone https://github.com/scrooloose/nerdcommenter.git

(For Neovim, change ~/.vim/ to ~/.config/nvim/.)

curl -fLo ~/.vim/plugin/NERD_Commenter.vim --create-dirs \
  https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/plugin/NERD_commenter.vim
curl -fLo ~/.vim/doc/NERD_Commenter.txt --create-dirs \
  https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/doc/NERD_commenter.txt

md ~\vimfiles\plugin
md ~\vimfiles\doc
$pluguri = 'https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/plugin/NERD_commenter.vim'
$docsuri = 'https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/doc/NERD_commenter.txt'
(New-Object Net.WebClient).DownloadFile($pluguri, $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath("~\vimfiles\plugin\NERD_commenter.vim"))
(New-Object Net.WebClient).DownloadFile($docsuri, $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath("~\vimfiles\doc\NERD_commenter.txt"))

Make sure that you have filetype plugins enabled, as the plugin makes use of |commentstring| where possible (which is usually set in a filetype plugin). See |filetype-plugin-on| for details, but the short version is make sure this line appears in your vimrc:

filetype plugin on

Please see the vim help system for full documentation of all options: :help nerdcommenter

Several settings can be added to your vimrc to change the default behavior. Some examples:

" Add spaces after comment delimiters by default
let g:NERDSpaceDelims = 1

" Use compact syntax for prettified multi-line comments
let g:NERDCompactSexyComs = 1

" Align line-wise comment delimiters flush left instead of following code indentation
let g:NERDDefaultAlign = 'left'

" Set a language to use its alternate delimiters by default
let g:NERDAltDelims_java = 1

" Add your own custom formats or override the defaults
let g:NERDCustomDelimiters = { 'c': { 'left': '/**','right': '*/' } }

" Allow commenting and inverting empty lines (useful when commenting a region)
let g:NERDCommentEmptyLines = 1

" Enable trimming of trailing whitespace when uncommenting
let g:NERDTrimTrailingWhitespace = 1

The following key mappings are provided by default (there is also a menu provided that contains menu items corresponding to all the below mappings):

Most of the following mappings are for normal/visual mode only. The |NERDComInsertComment| mapping is for insert mode only.

• [count]<leader>cc |NERDComComment|

  Comment out the current line or text selected in visual mode.

• [count]<leader>cn |NERDComNestedComment|

  Same as cc but forces nesting.

• [count]<leader>c<space> |NERDComToggleComment|

  Toggles the comment state of the selected line(s). If the topmost selected line is commented, all selected lines are uncommented and vice versa.

• [count]<leader>cm |NERDComMinimalComment|

  Comments the given lines using only one set of multipart delimiters.

• [count]<leader>ci |NERDComInvertComment|

  Toggles the comment state of the selected line(s) individually.

• [count]<leader>cs |NERDComSexyComment|

  Comments out the selected lines with a pretty block formatted layout.

• [count]<leader>cy |NERDComYankComment|

  Same as cc except that the commented line(s) are yanked first.

• <leader>c$ |NERDComEOLComment|

  Comments the current line from the cursor to the end of line.

• <leader>cA |NERDComAppendComment|

  Adds comment delimiters to the end of line and goes into insert mode between them.

• |NERDComInsertComment|

  Adds comment delimiters at the current cursor position and inserts between. Disabled by default.

• <leader>ca |NERDComAltDelim|

  Switches to the alternative set of delimiters.

• [count]<leader>cl
[count]<leader>cb |NERDComAlignedComment|

  Same as |NERDComComment| except that the delimiters are aligned down the left side (<leader>cl) or both sides (<leader>cb).

• [count]<leader>cu |NERDComUncommentLine|

  Uncomments the selected line(s).