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Mathematica > Character Operations >

Built-in Mathematica Symbol

LetterQ

LetterQ[string]
yields True if all the characters in the string are letters, and yields False otherwise.

LetterQ[string] by default gives False if string contains any space or punctuation characters.

LetterQ treats as letters all special characters explicitly listed as letters in the table in "Named Characters".

In general, LetterQ treats as letters all characters that appear as ordinary text in any language.

LetterQ does not treat as letters (\[EmptySet]), (\[HBar]), (\[Angstrom]) or (\[Sum]).

Test whether a character is a letter:

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