If you think about it, it ends in a question.

O say, does that Star-Spangled Banner yet wave,
O’er the land of the free and the home of the brave?

Second stanza answers it.

On the shore dimly seen through the mists of the deep
Where the foe’s haughty host in dread silence reposes
What is that which the breeze o’er the towering steep
As it fitfully blows half conceals, half discloses?
Now it catches the gleam of the morning’s first beam,
In full glory reflected now shines on the stream,
‘Tis the Star-Spangled Banner, O long may it wave,
O’er the land of the free, and the home of the brave!