pub const NAN: f64 = f64::NAN; // NaNf64
Not a Number (NaN). Use f64::NAN instead.
// deprecated way let nan = std::f64::NAN; // intended way let nan = f64::NAN;
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/f64/constant.NAN.html