# Rust by Example

### 7.5.2 Guards

A match guard can be added to filter the arm.

fn main() {
let pair = (2, -2);
// TODO ^ Try different values for pair

match pair {
(x, y) if x == y => println!("These are twins"),
// The ^ if condition part is a guard
(x, y) if x + y == 0 => println!("Antimatter, kaboom!"),
(x, _) if x % 2 == 1 => println!("The first one is odd"),
_ => println!("No correlation..."),
}
}