iswdigit - test for decimal digit wide character


   #include <wctype.h>

   int iswdigit(wint_t wc);


   The  iswdigit()  function  is  the  wide-character  equivalent  of  the
   isdigit(3) function.  It tests whether wc is a wide character belonging
   to the wide-character class "digit".

   The  wide-character  class  "digit" is a subclass of the wide-character
   class "xdigit", and therefore also a  subclass  of  the  wide-character
   class  "alnum",  of  the  wide-character class "graph" and of the wide-
   character class "print".

   Being a subclass  of  the  wide  character  class  "print",  the  wide-
   character  class  "digit"  is  disjoint  from  the wide-character class

   Being a  subclass  of  the  wide-character  class  "graph",  the  wide-
   character  class  "digit"  is  disjoint  from  the wide-character class
   "space" and its subclass "blank".

   Being a  subclass  of  the  wide-character  class  "alnum",  the  wide-
   character  class  "digit"  is  disjoint  from  the wide-character class

   The wide-character class "digit" is disjoint  from  the  wide-character
   class  "alpha" and therefore also disjoint from its subclasses "lower",

   The wide-character class "digit" always contains exactly the digits '0'
   to '9'.


   The  iswdigit()  function  returns  nonzero  if  wc is a wide character
   belonging to the wide-character class "digit".  Otherwise,  it  returns


   For   an   explanation   of   the  terms  used  in  this  section,  see

   Interface   Attribute      Value          
   iswdigit()  Thread safety  MT-Safe locale 


   POSIX.1-2001, POSIX.1-2008, C99.


   The behavior of iswdigit() depends on  the  LC_CTYPE  category  of  the
   current locale.


   isdigit(3), iswctype(3)


   This  page  is  part of release 4.09 of the Linux man-pages project.  A
   description of the project, information about reporting bugs,  and  the
   latest     version     of     this    page,    can    be    found    at

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