// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

pub fn main() {
    use std::f64;
    let x = "NaN".to_string();
    assert_eq!(format!("{}", f64::NAN), x);
    assert_eq!(format!("{:e}", f64::NAN), x);
    assert_eq!(format!("{:E}", f64::NAN), x);
}