C in a Nutshell

Name

iswcntrl

Synopsis

Ascertains whether a given wide character is a control character

#include <wctype.h>
intiswcntrl( wint_t wc );

The iswcntrl() function is the wide-character version of the iscntrl() character classification function. It tests whether its wide character argument is a control character. If the argument is a control character, iswcntrl() returns a nonzero value (that is, true); if not, the function returns 0 (false).

The function may yield different results depending on the current locale setting for the localization category LC_CTYPE, which you can query or change using the setlocale() function.

Example

See the example for iswalpha() in this chapter.

See Also

The corresponding function for byte characters, iscntrl(); iswalnum(), iswalpha(), iswblank(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), setlocale(); the extensible wide-character classification function, iswctype()