C <wctype.h> - iswxdigit() Function
The C <wctype.h> iswxdigit() function is used to check if the given wide character is a hexadecimal digit or not. Hexadecimal digits are one of the following character: 0123456789abcdefABCDEF.
Syntax
int iswxdigit ( wint_t ch );
Parameters
Return Value
Returns non-zero value (i.e, true) if ch is a hexadecimal digit, else returns zero (i.e, false).
Example:
The example below shows the usage of iswxdigit() function.
#include <stdio.h> #include <wchar.h> #include <wctype.h> int main (){ wchar_t str[] = L"ff123YZ"; //counting the numbers of wide //hexadecimal digits in str int i = 0, count = 0; while(str[i]) { if(iswxdigit(str[i])) count++; i++; } //displaying the output printf("%ls contains %d hexadecimal digits.", str, count); return 0; }
The output of the above code will be:
ff123YZ contains 5 hexadecimal digits.
❮ C <wctype.h> Library