mod Main {
    fn add(a: i32, b: i32) -> i32 {
        return a + b;
    }

    fn check(a: i32) -> i32 {
        if a == 2 {
            return a;
        } else {
            return 0;
        }
    }

    pub fn main() -> i32 {
        let x: i32 = 2 + 3;
        let y: i32 = add(x, 4);
        return y;
    }
}