Many operations in Vim can be executed over a given number of lines. For
d3j will delete the current line, plus the 3 below it. You may
find yourself reading the line numbers and then subtracting two numbers
in your head to decide how many lines to execute a command over. But
there is a better way.
Vim allows the line numbers to show relative to current cursor position
:set relativenumber. Here’s a short demonstration:
relativenumber enabled, one can simply glance at the number above or
below the current line, rather than do mental math.
Since Vim 7.4, you can also enable
set number at the same time so instead of
your current line number showing 0 it will show the normal, absolute line
number. Therefore, I recommend you upgrade to Vim 7.4 and use the following