とりあえず断片的な何か

procedure main: args do
    System.out println: "Hello world";
end

procedure main: args do
    for i = 1 to 100 do
        if i % 15 == 0 then
            System.out println: "FizzBuzz";
        elsif i % 3 == 0 then
            System.out println: "Fizz";
        elsif i % 5 == 0 then
            System.out println: "Buzz";
        else
            System.out println: i;
        end
    end
end

assert 0 < x else
    throw new IllegalArgumentException;
end