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