19. breaking from labeled blocks

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11

let result = 'block: {
    let result = 20i32;
    if result < 10 {
        break 'block 1;
    }
    if result > 10 {
        break 'block 2;
    }
    3
};
assert_eq!(result, 2);