=====isxdigit=====
Syntax:

<code>
    #include <cctype>
    int isxdigit( int ch );
</code>
The function isxdigit() returns non-zero if its argument is a hexadecimal digit
(i.e. A-F, a-f, or 0-9). Otherwise, zero is returned.

Related Topics: [[isalnum]], [[isalpha]], [[iscntrl]], [[isdigit]], [[isgraph]], [[ispunct]], [[isspace]]