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CTRL-A          Add [count] to the number or alphabetic character at
            or after the cursor.

CTRL-X          Subtract [count] from the number or alphabetic
            character at or after the cursor.

What does it exactly mean "... or alphabetic character" in this help doc?

I have interpreted that it should increase/decrease the alphabetic character (ASCII value), even though it does not make sense though. Anyway, it does not do anything to alphabetic charactor. I appreciate any usage case with an example how to apply CTRL-A/CTRL-X to an alphabetic character. Maybe, I am just confused the way it is written.

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"Alphabetical character" here stands for [A-Za-z] (see also :h /\a).

Make sure you've also seen :h 'nrformats' as alpha is not set by default.

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  • thanks that wroks.
    – Choi
    Aug 28, 2021 at 11:15

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