It adds a sequential number to the beginning of each line in your text.
Yes, you can set any starting number instead of always beginning at 1.
You can choose from separators like "1. ", "1) ", "1 - ", "1: ", or a plain space between the number and the line text.
Zero-padding adds leading zeros so all numbers have the same width, such as 01, 02, ... 10, based on the total number of lines.
Yes, it numbers every line in your input regardless of how many lines there are.