<image> As shown in the figure, a circle with a radius of $$1$$ unit rolls one full revolution to the right along the number line from the origin. A point $$A($$ which coincides with the origin when rolling starts $$)$$ on the circle reaches point $$B$$. Therefore, the length of $$AB$$ is equal to the circumference of the circle, ______, so the number represented by point $$B$$ on the number line is ______, which is a ______ number.