example.lox

fun fizzBuzz(n) {
    if (n == 0) return;
    if (n % 3 == 0 and n % 5 == 0) {
        print "FizzBuzz";
    } else if (n % 3 == 0) {
        print "Fizz";
    } else if (n % 5 == 0) {
        print "Buzz";
    } else {
        print n;
    }
    return fizzBuzz(n - 1);
}

class FizzBuzzer {
    init(n) {
        this.n = n;
    }

    doSth() {
        for (var i = 1; i <= this.n; i = i + 1) {
            var output = "";
            if (this.isFizz(i)) output = "Fizz";
            if (this.isBuzz(i)) output = output + "Buzz";
            if (!output) output = output + i;
            print output;
        }
    }

    isFizz(n) {
        return !(n % 3);
    }

    isBuzz(n) {
        return !(n % 5);
    }
}

var fizzBuzzer = FizzBuzzer(15);

print "Recursive:";
fizzBuzz(15);
print "";
print "Iterative:";
fizzBuzzer.doSth();