# Digit

- `v::digit()`

This is similar to v::alnum(), but it doesn't allow a-Z. It also
accepts empty values and whitespace, so use `v::notEmpty()` and
`v::noWhitespace()` when appropriate.

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See also:

  * [Alnum](Alnum.md)
  * [Alpha](Alpha.md)
  * [Vowel](Vowel.md)
  * [Consonant](Consonant.md)