Notepad++ Replace regex match for same text plus appending character

Question

I have a file with text and numbers with a length of 5 (i.e. 12000, 11153, etc.). I want to append all of these numbers with a 0. So <

Answer 1

You are very near to the answer! What you missed is a capturing group.

Use this regex in "Find what" section:

([0-9]{5})

In "Replace with", use this:

\10

The ( and ) represent a capturing group. This essentially means that you capture your number, and then replace it with the same followed by a zero.