To Comment / UnComment single / multiple lines of code for different source files

To Comment / UnComment single / multiple lines of code for different source files

Method 1:
Vim Visual Mode
Ctrl-v jjjjjj shift-i # Ctrl-[

Method 2:
Ctrl-v jjjjjj shift-i # ESC

Method 3 (GOOD):
Put following lines in your ~/.vimrc
map ,c I#

In vim, press ctrl-v to switch to block visual mode, then press ,c to comment.

To uncomment, press ctrl-v jjjjjjx (cut).
Note: this works in visual mode as well.

Method 4:
Put these lines in your ~/.vimrc
map ,c :s/^/#/
map ,u :s/^#//

Note: this works in visual mode as well.

Method 5:
Use this plugin: comments.vim