Syntax:

    #include <cctype>
    int iscntrl( int ch );

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