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ISWALPHA(3)                Linux Programmer's Manual               ISWALPHA(3)



NAME
       iswalpha - test for alphabetic wide character

SYNOPSIS
       #include <wctype.h>

       int iswalpha(wint_t wc);

DESCRIPTION
       The  iswalpha() function is the wide-character equivalent of the isalpha(3) function.  It tests whether wc is a
       wide character belonging to the wide-character class "alpha".

       The wide-character class "alpha" is a subclass of the wide-character class "alnum", and therefore also  a  sub-
       class of the wide-character class "graph" and of the wide-character class "print".

       Being  a  subclass  of  the wide-character class "print", the wide-character class "alpha" is disjoint from the
       wide-character class "cntrl".

       Being a subclass of the wide-character class "graph", the wide-character class "alpha"  is  disjoint  from  the
       wide-character class "space" and its subclass "blank".

       Being  a  subclass  of  the wide-character class "alnum", the wide-character class "alpha" is disjoint from the
       wide-character class "punct".

       The wide-character class "alpha" is disjoint from the wide-character class "digit".

       The wide-character class "alpha" contains the wide-character classes "upper" and "lower".

       The wide-character class "alpha" always contains at least the letters 'A' to 'Z' and 'a' to 'z'.

RETURN VALUE
       The iswalpha() function returns non-zero if wc is a  wide  character  belonging  to  the  wide-character  class
       "alpha".  Otherwise it returns zero.

CONFORMING TO
       C99.

NOTES
       The behavior of iswalpha() depends on the LC_CTYPE category of the current locale.

SEE ALSO
       isalpha(3), iswctype(3)

COLOPHON
       This  page  is part of release 3.22 of the Linux man-pages project.  A description of the project, and informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



GNU                               1999-07-25                       ISWALPHA(3)