iswupper(3) Library Functions Manual iswupper(3) iswupper - , LIBRARY Standard C library (libc, -lc) #include int iswupper(wint_t wc); iswupper() isupper(3), . , wc , <>. <> <> , , <>, <> <>. <>, <> <>. <>, <> <> <>. <>, <> <>. <>, <> <>. <> , , wc, towupper(wc) towlower(wc). The wide-character class "upper" always contains at least the letters 'A' to 'Z'. iswupper() , wc , <>. 0. attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |iswupper() | | MT-Safe locale | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. POSIX.1-2001, C99. iswupper() LC_CTYPE . This function is not very appropriate for dealing with Unicode characters, because Unicode knows about three cases: upper, lower, and title case. . isupper(3), iswctype(3), towupper(3) Azamat Hackimov , Dmitriy S. Seregin , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . iswupper(3)