Fibonacci in Rust

fn fibonacci_sum(n: u32) -> u32 {
    let mut a = 0;
    let mut b = 1;
    let mut total = 0;

    for _ in 0..n {
        total += a;
        let temp = a + b;
        a = b;
        b = temp;
    }

    total
}

fn main() {
    let n = 10;
    println!("A soma dos {} primeiros números de Fibonacci é {}", n, fibonacci_sum(n));
}