def bubbleSort(arr):     
    n = len(arr)
    for i in range(n):
        for j in range(0, n - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
arr = [ 2, 1, 10, 23 ]
bubbleSort(arr)
print("Sorted array is:")
for i in range(len(arr)):
    print("%d" % arr[i])