21. Summary

It is yet time again to review what we have learned. We now have seen six additional Python keywords:

• if
• elif
• else
• True
• False
• not

in addition to the three we had first seen.:

• def
• from
• import

We have seen four functions which help inform Reeborg about the state of its world:

• object_here()
• at_goal()
• front_is_clear()
• wall_in_front()

We have also seen another function:

• done()

which is in addition to:

• move()
• turn_left()
• take()
• put()
• pause()