DigitCharacter

DigitCharacter represents a digit character 0–9 in StringExpression.

Examples

Match all digits in a string:

StringCases["abc123def456", DigitCharacter]
(* {"1", "2", "3", "4", "5", "6"} *)

Match sequences of digits:

StringCases["abc123def456", DigitCharacter ..]
(* {"123", "456"} *)

Please visit the official Wolfram Language Reference for more details.