An example of a nested for/while loop in Rust...

for_while.rs

fn main() {
    let lang = "Rust";
    let rust_is_amazing = true;
    let mut count = 0i;

    for _ in range(0i, 5) {
        while count < 10 && rust_is_amazing == true {
            println!("Is, {} amazing? {}", lang, rust_is_amazing);
            count += 1;
        }
        count = 0;
    }
}