diff --git a/bubble_sort.py b/bubble_sort.py
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+"""
+Bubble Sort Algorithm in Python
+--------------------------------
+This program implements the Bubble Sort algorithm.
+
+Bubble Sort repeatedly steps through the list, compares adjacent elements,
+and swaps them if they are in the wrong order. This process is repeated
+until the list is sorted.
+
+Time Complexity:
+    - Best Case: O(n) when the list is already sorted
+    - Average Case: O(n²)
+    - Worst Case: O(n²)
+Space Complexity: O(1)
+"""
+
+def bubble_sort(arr):
+    """
+    Sorts a list in ascending order using Bubble Sort.
+    
+    Args:
+        arr (list): The list of elements to be sorted.
+    
+    Returns:
+        list: The sorted list.
+    """
+    n = len(arr)
+    for i in range(n):
+        swapped = False
+        for j in range(0, n - i - 1):
+            if arr[j] > arr[j + 1]:
+                arr[j], arr[j + 1] = arr[j + 1], arr[j]
+                swapped = True
+        # If no two elements were swapped in inner loop, list is sorted
+        if not swapped:
+            break
+    return arr
+
+
+if __name__ == "__main__":
+    sample = [64, 34, 25, 12, 22, 11, 90]
+    print("Original array:", sample)
+    sorted_arr = bubble_sort(sample)
+    print("Sorted array:", sorted_arr)