How to use vim to quickly organize numbers

Question

I have this number in my file:

123456
223456
333456
443456

I want to use vim to organize it like this:

123456,223456,333456,443456

This file is very long, and it will definitely not be efficient if you edit it bit by bit. Is there any good way to record macros?

Answer 1

If you want to convert the branch data into comma-separated data, you can use the following replacement command:
:%s/$n/, /g