isalpha()

IMPORT_C int isalpha(int c);

Description

Test for an alphabetic character. For Unicode, the function returns TRUE for all letters, including those from syllabaries and ideographic scripts. The function returns FALSE for letter-like characters that are in fact diacritics. Specifically, the function returns TRUE for categories: ELuCategory, ELtCategory, ELlCategory, and ELoCategory; it returns FALSE for all other categories including ELmCategory.

Parameters

int c an integer whose value is representable as an unsigned char.

Return value

int True, if the character is alphabetic; false, otherwise.