find the volume of a cone in rust

To find the volume of a cone in Rust, we need to use the formula:

main.rs
V = (1/3) * π * r^2 * h
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where r is the radius of the base of the cone and h is the height of the cone.

Here's how we can implement this formula in Rust:

main.rs
fn cone_volume(radius: f64, height: f64) -> f64 {
    const PI: f64 = std::f64::consts::PI;
    (1.0 / 3.0) * PI * radius.powi(2) * height
}
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In this function, we've used the powi method to raise the radius to the power of 2. We've also declared PI as a constant with the value of π using the std::f64::consts::PI constant from the Rust standard library.

We can then call this function with the appropriate values to calculate the volume of any cone:

main.rs
fn main() {
    let radius = 5.0;
    let height = 10.0;
    let volume = cone_volume(radius, height);
    println!("The volume of the cone is: {}", volume);
}
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This will output The volume of the cone is: 261.7993877991494 for a cone with a radius of 5 and a height of 10.