diff --git a/vimrc b/vimrc
index 49216a4..139cec4 100644
--- a/vimrc
+++ b/vimrc
@@ -163,3 +163,14 @@ function! <SID>BufcloseCloseIt()
      execute("bdelete! ".l:currentBufNum)
    endif
 endfunction
+" Commenting blocks of code.
+autocmd FileType c,cpp,java,scala,javascript let b:comment_leader = '// '
+autocmd FileType sh,ruby,python   let b:comment_leader = '# '
+autocmd FileType conf,fstab       let b:comment_leader = '# '
+autocmd FileType tex              let b:comment_leader = '% '
+autocmd FileType vim              let b:comment_leader = '" '
+noremap <leader>cc :<C-B><C-E>s/^/<C-R>=escape(b:comment_leader,'\/')<CR>/<CR>:nohlsearch<CR>
+noremap <leader>cu :<C-B><C-E>s/^\V<C-R>=escape(b:comment_leader,'\/')<CR>//e<CR>:nohlsearch<CR>
+vnoremap <leader>cc :<C-B><C-E>s/^/<C-R>=escape(b:comment_leader,'\/')<CR>/<CR>:nohlsearch<CR>
+vnoremap <leader>cu :<C-B><C-E>s/^\V<C-R>=escape(b:comment_leader,'\/')<CR>//e<CR>:nohlsearch<CR>
+