Increasing or decreasing numbers
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Tip 30 Previous Next created March 7, 2001 · complexity basic · author neuron · version 7.0
You can increment or decrement a number by pressing Ctrl-A or Ctrl-X when in Normal mode. The number can be at the cursor, or after the cursor.
The number can be decimal, hexadecimal or octal. You can also increment or decrement a single letter ("a...", "b...", "c..."). This is controlled with the 'nrformats' option.
Ctrl-A is very useful in a macro. As an example, suppose you type the line:
101 This is an item.
In Normal mode, enter the following to record a macro into the a register. This macro yanks the current line, then pastes it below, then increments the number.
qa Y p Ctrl-A q
Now type 15@a to perform the macro 15 times. You will see:
101 This is an item. 102 This is an item. 103 This is an item. 104 This is an item. and so on
On Windows, your _vimrc file may source mswin.vim. That script sets Ctrl-A to Select All. If you want to use Ctrl-A in Normal mode to increment a number, you need:
:nunmap <C-A>
[edit] Making a list
It's easy to insert a list of ascending numbers, for example:
:0put =range(11,15)
Executing this command (or the equivalent :call append(0,range(11,15))) inserts the following after line 0 (that is, at the start of the buffer):
11 12 13 14 15
Here is a more elaborate example:
:for i in range(1,10) | put ='192.168.0.'.i | endfor
Executing this command inserts the following after the current line:
192.168.0.1 192.168.0.2 192.168.0.3 192.168.0.4 192.168.0.5 192.168.0.6 192.168.0.7 192.168.0.8 192.168.0.9 192.168.0.10
