Rust 1.0.0-alpha.2

fn main() {
    println!("Hello, World!");
}

fn factorial(x: i64) -> i64 {
  if x <= 1 {
    1
  } else {
    x * factorial(x - 1)
  }
}

fn main() {
  for i in 0..17 {
    println!("{}! = {}", i, factorial(i));
  }
}

fn fibonacci(x: i64) -> i64 {
  if x <= 2 {
    1
  } else {
    fibonacci(x - 1) + fibonacci(x - 2)
  }
}

fn main() {
  for i in 1..17 {
    print!("{}, ", fibonacci(i));
  }
  println!("...");
}