iswcntrl(3) Library Functions Manual iswcntrl(3) iswcntrl - (libc -lc) #include int iswcntrl(wint_t wc); iswcntrl() iscntrl(3). wc "cntrl". "cntrl" "print" "graph" "alpha" "upper" "lower" "digit" "xdigit" "punct". c iscntrl(c) iswcntrl(btowc(c)) . iswcntrl() wc "cntrl". . attributes(7). +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ | | | | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ |iswcntrl() | | (locale) (MT-Safe) | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ C11, POSIX.1-2008. POSIX.1-2001 C99. iswcntrl() LC_CTYPE . iscntrl(3), iswctype(3) 3 . . : . 6.18 8 2026 iswcntrl(3)