Featuring

• algebraic data types
• pattern matching
• closures
• type inference
• zero-cost abstractions
• guaranteed memory safety
• optional garbage collection
• concurrency without data races
• minimal runtime
• efficient C bindings

fn main() {
  // A simple integer calculator:
  // `+` or `-` means add/sub by 1
  // `*` or `/` means mul/div by 2
 
  let program = "+ + * - /";
  let mut accumulator = 0;
 
  for token in program.chars() {
    match token {
      '+' => accumulator += 1,
      '-' => accumulator -= 1,
      '*' => accumulator *= 2,
      '/' => accumulator /= 2,
      _ => { /* ignore everything else */ }
    }
  }
 
  println!("The program \"{}\" calculates the value {}",
       program, accumulator);
}