iswblank(3) Library Functions Manual iswblank(3) iswblank - (libc -lc) #include int iswblank(wint_t wc); glibc ( feature_test_macros(7)): iswblank(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L iswblank() isblank(3). wc "blank". "blank" "space". "space" "blank" "graph" "alnum" "alpha" "upper" "lower" "digit" "xdigit" "punct". "blank" '\t'. iswblank() wc "blank". . attributes(7). +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ | | | | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ |iswblank() | | (locale) (MT-Safe) | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ POSIX.1-2008. POSIX.1-2001. iswblank() LC_CTYPE . isblank(3), iswctype(3) 3 . . : . 6.18 8 2026 iswblank(3)