bubble sort algorithm

# Sort the array from lowest to highest
def bubble_sort(array)
  n = array.length 

    swapped = false 
      (n-1).times do |i|
        if array[i] > array[i + 1] 
          array[i], array[i + 1] = array[i + 1], array[i]
          swapped = true
    end 
  end
  array
end

# expect it to return 42 below
result = bubble_sort([2, 42, 22, 02])
puts "max of 2, 42, 22, 02 is: #{result}"

# expect it to return 2 below
result = bubble_sort([2, 42, 22, 02])
puts "min of 2, 42, 22, 02 is: #{result}"

 
# expect it to return nil when empty array is passed in
result = bubble_sort([])
puts "max on empty set is: #{result.inspect}"
result = bubble_sort([])
puts "min on empty set is: #{result.inspect}"
 
result = bubble_sort([-23, 0, -3])
puts "max of -23, 0, -3 is: #{result}"
 
result = bubble_sort([6])
puts "max of just 6 is: #{result}"