feat: add ascending and descending sorting support to Bubble Sort CLI

Author: jyotish6699

math/Bubble-Sort/bubble_sort.py

@@ -1,44 +1,96 @@
-def bubble_sort(arr):
+print("🔄 Bubble Sort Interactive Tool 🔄")
+print("Sort numbers in Ascending or Descending order\n")
+
+
+def bubble_sort(arr, reverse=False):
     """
-    Sorts a list in-place using the Bubble Sort algorithm.
+    Sorts a list using the Bubble Sort algorithm.
     Returns the sorted list.
     """
+
+    arr = arr.copy()
     n = len(arr)
+
     for i in range(n):
         swapped = False
+
         # Last i elements are already in place
-        for j in range(0, n-i-1):
-            # Swap if the element found is greater than the next element
-            if arr[j] > arr[j+1]:
-                arr[j],arr[j+1]=arr[j+1],arr[j]
+        for j in range(0, n - i - 1):
+
+            # Ascending Order
+            if not reverse and arr[j] > arr[j + 1]:
+                arr[j], arr[j + 1] = arr[j + 1], arr[j]
+                swapped = True
+
+            # Descending Order
+            elif reverse and arr[j] < arr[j + 1]:
+                arr[j], arr[j + 1] = arr[j + 1], arr[j]
                 swapped = True
-        # If no two elements were swapped by inner loop , then break
+
+        # If no swaps happened, list is already sorted
         if not swapped:
             break
+
     return arr
 
+
 def test_bubble_sort():
-    """Background test cases to ensure logic accuracy before user input."""
+    """Background test cases to ensure logic accuracy."""
+
+    # Ascending Order Tests
     assert bubble_sort([64, 34, 25, 12, 22, 11, 90]) == [11, 12, 22, 25, 34, 64, 90]
     assert bubble_sort([5, 1, 4, 2, 8]) == [1, 2, 4, 5, 8]
 
+    # Descending Order Tests
+    assert bubble_sort([5, 1, 4, 2, 8], reverse=True) == [8, 5, 4, 2, 1]
+
+    # Edge Case Tests
+    assert bubble_sort([]) == []
+    assert bubble_sort([1]) == [1]
+    assert bubble_sort([-1, -5, 3, 0]) == [-5, -1, 0, 3]
+
+
 if __name__ == "__main__":
-    #Background testing execution
+
+    # Background testing execution
     test_bubble_sort()
 
-    # --- USER INTERACTION SECTION ---
     print("=== Bubble Sort Interactive Tool ===")
+
     try:
-        user_input = input("Enter numbers to sort seperated by spaces (e.g., 64 34 25) :")
+        user_input = input(
+            "➡️ Enter numbers to sort separated by spaces (e.g., 64 34 25): "
+        )
+
         if not user_input.strip():
-            print("Error: Input cannot be empty!")
+            print("❌ Error: Input cannot be empty!")
+
         else:
-            # Convert String Input  into  List of Integers
-            arr=[int(x) for x in user_input.split()]
-            print(f"Original list : {arr}")
+            # Convert string input into list of integers
+            arr = [int(x) for x in user_input.split()]
+
+            print("\nChoose sorting order:")
+            print("1. Ascending")
+            print("2. Descending")
+
+            order_choice = input("➡️ Enter your choice (1 or 2): ").strip()
+
+            if order_choice == "1":
+                sorted_arr = bubble_sort(arr)
+
+                print(f"\n📊 Original list: {arr}")
+                print(f"✅ Sorted list (Ascending): {sorted_arr}")
+
+            elif order_choice == "2":
+                sorted_arr = bubble_sort(arr, reverse=True)
+
+                print(f"\n📊 Original list: {arr}")
+                print(f"✅ Sorted list (Descending): {sorted_arr}")
+
+            else:
+                print("❌ Invalid sorting choice! Please select 1 or 2.")
 
-            # Sort operation performed
-            sorted_arr = bubble_sort(arr)
-            print(f"Sorted list: {sorted_arr}")
     except ValueError:
-        print("Error: Please enter valid integers only.")
+        print("❌ Error: Please enter valid integers only.")
+
+    print("\n👋 Thank you for using Bubble Sort Tool!")