Constant std::f128::consts::FRAC_1_SQRT_PI

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pub const FRAC_1_SQRT_PI: f128 = 0.564189583547756286948079451560772585844050629328998856844086_f128; // 0.564189583547756286948079451560772632f128
🔬This is a nightly-only experimental API. (f128 #116909)
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1/sqrt(π)