Calculates the weighted average of two or more numbers

Weighted Average in Rust.rs

///
///
/// # Arguments
///
/// * `nums`:
/// * `weights`:
///
/// returns: f64
///
/// # Examples
///
/// ```
///  let average = weighted_average(&[1.0, 2.0, 3.0], &[0.6, 0.2, 0.3]);
/// println!("{}", average)
/// ```
pub fn weighted_average(nums: &[f64], weights: &[f64]) -> f64 {
    let mut sum = 0.0;
    let mut weight_sum = 0.0;

    for i in 0..nums.len() {
        sum += nums[i] * weights[i];
        weight_sum += weights[i];
    }

    sum / weight_sum
}