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tty? 

        # IO.tty?

(from ruby core)
---
    tty?()

---

Returns `true` if *ios* is associated with a terminal device (tty),
`false` otherwise.

    File.new("testfile").isatty   #=> false
    File.new("/dev/tty").isatty   #=> true


(This method is an alias for IO#isatty.)

Returns `true` if *ios* is associated with a terminal device (tty),
`false` otherwise.

    File.new("testfile").isatty   #=> false
    File.new("/dev/tty").isatty   #=> true

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