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Constant std::f64::consts::LN_2

pub const LN_2: f64 = 0.693147180559945309417232121458176568f64; // 0.69314718055994529f64

ln(2)

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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/consts/constant.LN_2.html