pub const FRAC_2_SQRT_PI: f64 = 1.12837916709551257389615890312154517f64; // 1.1283791670955126f64
2/sqrt(π)
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/f64/consts/constant.FRAC_2_SQRT_PI.html