iswalnum(3) Library Functions Manual iswalnum(3) iswalnum - (libc -lc) #include int iswalnum(wint_t wc); iswalnum() isalnum(3). wc "alnum". "alnum" "graph" "print". "print" "alnum" "cntrl". "graph" "alnum" "space" "blank". "alnum" "punct". "alnum" "alpha" "digit". "xdigit". "alnum" 'A' 'Z' 'a' 'z' '0' '9'. iswalnum() wc "alnum". . attributes(7). +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ | | | | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ |iswalnum() | | (locale) (MT-Safe) | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ C11, POSIX.1-2008. POSIX.1-2001 C99. iswalnum() LC_CTYPE . isalnum(3), iswctype(3) 3 . . : . 6.18 8 2026 iswalnum(3)