Regular Expression Notepad increment numbers in every line

Question

I've to add numbers incrementally in the beginning of every line using Notepad++. It is the not the very beginning. But, like

  when ID = '1' then data
  when ID = '2' then data
  when ID = '3' then data
  .
  .
  .
  .
  when ID = '700' then

Is there any way i can increment these numbers by replacing with any expression or is there any inbuilt-notepad functions to do so.

Thanks

Answer 1

If you want to do this with notepad++ you can do it in the following way.

First you can write all the 700 lines with template text (you can use a Macro or use the Edit -> Column Editor). Once you have written it, put the cursor on the place you want the number, click Shift+Alt and select all the lines:

Answer 2

It's not possible to accomplish this with a regular expression, as you will need to have a counter and make arithmetic operations (such as incrementing by one).