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iswalpha

iswalpha


Alphabetic Wide Character Test

Portability: ISO/ANSI conforming, UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
CAUTION
RELATED FUNCTIONS
SEE ALSO

SYNOPSIS

#include <wctype.h>

int iswalpha(wint_t wc)

DESCRIPTION

iswalpha tests a wide character value wc to determine whether it is an alphabetic character (uppercase or lowercase). Specifically, iswalpha checks whether iswlower or iswupper is true for wc.

RETURN VALUE

iswalpha returns 0 if the wide character is not alphabetic, or a nonzero value if it is alphabetic. If the argument is WEOF, 0 is returned.

CAUTION

The effect of iswalpha on a non-wide character argument other than WEOF is undefined. Do not assume that iswalpha returns either a 0 or a 1.

RELATED FUNCTIONS

iswalnum, iswcntl, iswdigit, iswlower, iswpunct, iswspace, iswupper

SEE ALSO


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