# Display statistics in standard output.
	fun print_stats do
		if arr_len.sum == 0 then
			print "*** No Array stats ***"
			return
		end
		print "*** Array Stats ***"
		print "Number of calls to Array::to_s : {sys.arr_len.sum}"
		print "Average number of elements in an Array (when calling to_s) : {sys.avg_arr_len}"
		print "Average string size in Array : {sys.avg_s_len}"
		print "*** End of Stats ***"
	end