iswupper() -- tests if wide character is an uppercase letter

SYNOPSIS

#include <wctype.h>

int iswupper(wint_t wc);

The iswupper() function tests for any wide character that corresponds to an uppercase letter or is one of a locale-specific set of wide characters for which none of iswcntrl(), iswdigit(), iswpunct(), or iswspace() is true.

The behavior of the iswupper() function is affected by the current locale. To modify the behavior, change the LC_CTYPE category in setlocale(), that is, setlocale(LC_CTYPE, newlocale).

PARAMETERS

wc: Is a wide character code corresponding to a valid character in the current locale or the value of the macro WEOF.

RETURN VALUES

The iswupper() function returns non-zero for true and zero for false. If the parameter is not in the domain of the function, the behavior is undefined.