You know that typing DIR *. and an extension name displays all filenames with said extension, so that typing DIR *.BAT displays all batch files, DIR *.SCR displays all screensavers, etc. What about when you want to display all files without extensions? The following command does the trick:

DIR /A-D *.

Note that the /a-d modifier is needed, otherwise your list of files without extensions will also contain a list of subdirectories.

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