Bubble sorting in Ruby

bubble-sorting. rb

def bubbleSort(arr)
    swapped = true
    for i in 0 ... (arr.length - 1)
        swapped = false
        for j in 0 ... (arr.length - i - 1)
            if arr[j] > arr[j + 1]
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
                swapped = true
            end
        end
        break if swapped == false
    end
end

nums = [3, 2, 1, 5, 21, 8, 6, 9, 4, 7]
bubbleSort(nums)
p nums