LetterCharacter

LetterCharacter represents a letter character in StringExpression.

Examples

Match any letter character:

StringMatchQ["abc", LetterCharacter ..]
(* True *)

Find all letters in a string:

StringCases["a1b2c3", LetterCharacter]
(* {"a", "b", "c"} *)

Replace letters:

StringReplace["Hello123", LetterCharacter -> "X"]
(* "XXXXX123" *)

Please visit the official Wolfram Language Reference for more details.