SFML Pure Collatz

let collatz = (n) -> {
    if(x % 2 == 0) {
        return n / 2;
    } else {
        return 3 * n + 1;
    }
};

let steps = (n) -> {
    if(n <= 1) {
        return 0;
    }

    let s = (a, b) -> {
        if(a == 1) {
            return b;
        }

        return s(collatz(a), b + 1);
    };

    return s(n, 0);
};

print(steps(5));