sum_or_product.rs

fn sum_or_product(list: &[i64], n: usize) -> String {
    let first_numbers: &[i64] = &list[0 .. n];
    let last_numbers: &[i64] = &list[list.len() - n.. list.len()] ;

    let sum:i64 = first_numbers.iter().sum();
    let product:i64 = last_numbers.iter().product();

    if sum > product {
        return println!("sum")
    } else {
        return "product"
    }
}