* updating DIRECTORY.md
* updating DIRECTORY.md
* Delete empty junk file
* updating DIRECTORY.md
* Fix ruff errors
* Fix more ruff errors
---------
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Conversion
Conversion programs convert a type of data, a number from a numerical base or unit into one of another type, base or unit, e.g. binary to decimal, integer to string or foot to meters.