num_moons = 3 while num_moons > 0: print num_moons num_moons = num_moons - 1 num_moons print 'start' num_moons = -3 while num_moons > 0: print num_moons num_moons = num_moons - 1 print 'end' print 'start' num_moons = 3 while num_moons > 0: print num_moons print 'end'