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Mathematica > Core Language > String Manipulation > Character Operations > LetterQ >

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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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Test whether all characters in a string are letters:

Punctuation is not a letter:

Accented letters are still treated as letters:

Gothic letters are treated as letters:

Greek letters are treated as letters:

Characters that are not letters in ordinary natural language are not treated as letters:

All characters treated as letters:

Contiguous characters in character space may not all be letters:

An actual script-B character is nevertheless a letter:

Plot the character codes of letters:

Include the actual names of characters: