Are you facing problems with commenting in code using VIM?
Here's a nice little trick which proved to be very helpful in my coding experience with VIM editor.
Lets say you want '#' character repeated 100 times to make your code look more neat.
Then all you have to do is
In the insert mode type <C-o>100i#<Esc>.
C-o means you have to type CTRL + O.
# is the character you want to repeat.
ESC - to get your output.
And you will have # repeated 100 times.
This can be done for any character
# - needed in bash scripting, python
% - Matlab commenting
// - C coding.
Source : - http://stackoverflow.com/questions/5054128/repeating-characters-in-vim-insert-mode