Function collatz

examples/collatz.rs:20–36

(input: f64)

}

fn collatz(input: f64) -> Vec<f64> {
    let mut list: Vec<f64> = Vec::new();
    if input != 0.0 {
        let mut step: f64 = input;

        while !list.contains(&step) {
            list.push(step);
            if step % 2.0 == 0.0 {
                step /= 2.0;
            } else {
                step = step * 3.0 + 1.0
            }
        }
        list.push(step);
    }
    list
}