Code shared from the Rust Playground

playground.rs

fn main() {
    let mut buffer = String::new();
    for i in 1..100 {
        buffer = fizzbuzz(i, buffer);
        println!("{}", buffer);
        buffer.clear();
    }
}

fn fizzbuzz(i: u32, mut buffer: String) -> String {
    if i % 3 == 0 && i % 5 == 0 {
        buffer.push_str("FizzBuzz")
    } else if i % 3 == 0 {
        buffer.push_str("Fizz")
    } else if i % 5== 0 {
        buffer.push_str("Buzz")
    } else {
        buffer.push_str(&format!("{}", i))
    }
    buffer
}