# chars/digit? Check if a character is a digit (0-9). ## Syntax

[chars/digit? $ch]

## Parameters - `$ch` — A single-character string. ## Examples

[chars/digit? "0"]    # true
[chars/digit? "9"]    # true
[chars/digit? "a"]    # false

## Returns Boolean. `false` for empty strings. ## See Also `chars/alpha?`, `chars/word?`, `chars/ident-cont?`