libc.info: iswcntrl

Go forward to iswdigit
Go backward to iswalpha
Go up to Ctype
Go to the top op libc

`iswcntrl'--wide-character cntrl test

*Synopsis*
     #include <wctype.h>
     int iswcntrl(wint_t C);
   *Description*
`iswcntrl' is a function which classifies wide-character values that
are categorized as a control character.
*Returns*
`iswcntrl' returns non-zero if C is a control wide-character.
*Portability*
`iswcntrl' is C99.
   No supporting OS subroutines are required.