Function rufl::math::round_down

source · 
pub fn round_down<T>(number: T, n: usize) -> T
where
    T: Float + Mul<f64, Output = T> + Div<f64, Output = T>,
Expand description

Round down and truncate off n decimal places to number.

§Arguments

  • number - The number to round and truncate.

  • n - n digits after decimal point.

§Returns

Rounded number.

§Examples

use rufl::math;

let pi: f64 = std::f64::consts::PI;

assert_eq!(math::round_down(pi, 0), 3.0);
assert_eq!(math::round_down(pi, 1), 3.1);
assert_eq!(math::round_down(pi, 2), 3.14);
assert_eq!(math::round_down(pi, 3), 3.141);
assert_eq!(math::round_down(pi, 4), 3.1415);