◄Description► ◄Example► ◄Up► ◄Contents► ◄Index► ◄Back► ─────Run-Time Library─────────────────────────────────────────────────────── Include: <io.h> Syntax: int _isatty( int handle ); Returns: a nonzero value if <handle> is a character device, or 0 if it is not. See also: _fileno -♦-