//! Constants
pub const N_MEAN: f32 = 0.0;
pub const N_STD_DEV: f32 = 1.0;
pub const SQRT_2PI: f32 = 2.5066282;
pub const HALF: f32 = 0.5;
pub const DAYS_PER_YEAR: f32 = 365.25;
pub use std::f32::consts::{E, PI};