iswlower(3) Library Functions Manual iswlower(3) iswlower - (libc -lc) #include int iswlower(wint_t wc); iswlower() islower(3). wc "lower". "lower" "alpha" "alnum" "graph" "print". "print" "lower" "cntrl". "graph" "lower" "space" "blank". "alnum" "lower" "punct". "alpha" "lower" "digit". "lower" wc towlower(wc) towupper(wc). "lower" 'a' 'z'. iswlower() wc "lower". . attributes(7). +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ | | | | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ |iswlower() | | (locale) (MT-Safe) | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ C11, POSIX.1-2008. POSIX.1-2001 C99. iswlower() LC_CTYPE . : . islower(3), iswctype(3), towlower(3) 3 . . : . 6.18 8 2026 iswlower(3)