C in a Nutshell

Name

iswdigit

Synopsis

Ascertains whether a given wide character is a decimal digit

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

The iswdigit() function is the wide-character version of the isdigit() character classification function. It tests whether its wide character argument corresponds to a digit character.

The digit wide characters are L'0' (not to be confused with the null character L'\0') through L'9'. The iswdigit() function returns a nonzero value (that is, true) if the wide character represents a digit; if not, it returns 0 (false).

Example

See the example for iswalpha() in this chapter.

See Also

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