gist example

snippet.txt

```python
def bubble_sort(arr): 
    n = len(arr)

    # 遍历所有数组元素
    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]

    return arr

```