=====iscntrl=====
Syntax:

<code>
    #include <cctype>
    int iscntrl( int ch );
</code>
The iscntrl() function returns non-zero if its argument is a control character
(between 0 and 0x1F or equal to 0x7F). Otherwise, zero is returned.

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