From 993c4c06fcd97f8bff6f591e4f6c9f8ef4c370d1 Mon Sep 17 00:00:00 2001
From: ViswaNikhitha <2400100046@kluniversity.in>
Date: Thu, 1 Jan 2026 14:34:13 +0530
Subject: [PATCH 1/2] Create circle.py

---
 circle.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 circle.py

diff --git a/circle.py b/circle.py
new file mode 100644
index 0000000..bfe0f32
--- /dev/null
+++ b/circle.py
@@ -0,0 +1,15 @@
+import math
+
+def circle_properties(radius):
+    area = math.pi * radius * radius
+    circumference = 2 * math.pi * radius
+    return area, circumference
+
+
+# Example usage
+r = 5
+area, circumference = circle_properties(r)
+
+print("Radius:", r)
+print("Area:", round(area, 2))
+print("Circumference:", round(circumference, 2))

From 87995d7832a91148b19904954d9f3a2b6cf844e7 Mon Sep 17 00:00:00 2001
From: ViswaNikhitha <2400100046@kluniversity.in>
Date: Thu, 1 Jan 2026 14:57:43 +0530
Subject: [PATCH 2/2] Update circle.py

---
 circle.py | 57 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 49 insertions(+), 8 deletions(-)

diff --git a/circle.py b/circle.py
index bfe0f32..18bd27f 100644
--- a/circle.py
+++ b/circle.py
@@ -1,15 +1,56 @@
-import math
+"""
+Circle Properties Calculation
+
+Description:
+This algorithm calculates the area and circumference of a circle given its radius.
+It uses the formulas:
+    Area = π * r^2
+    Circumference = 2 * π * r
+
+Approach:
+- Take the radius as input
+- Compute area and circumference
+- Return both values
+
+Use Cases:
+- Geometry calculations
+- Basic math learning
+- DSA practice examples
+
+Time Complexity: O(1)
+- All calculations are done in constant time, independent of input size.
+
+Space Complexity: O(1)
+- Uses only a few variables, no extra data structures needed.
+"""
+
+import math  # Import math module to access pi
 
 def circle_properties(radius):
+    """
+    Calculates area and circumference of a circle given its radius
+    :param radius: Radius of the circle
+    :return: Tuple (area, circumference) or error message for negative radius
+    """
+    # Validate input
+    if radius < 0:
+        return "Error: Radius cannot be negative"
+
+    # Calculate area using formula π * r^2
     area = math.pi * radius * radius
+    
+    # Calculate circumference using formula 2 * π * r
     circumference = 2 * math.pi * radius
+    
+    # Return both results
     return area, circumference
 
+# Example usage / Test cases
+if __name__ == "__main__":
+    test_radii = [5, 0, -3]  # Different test cases including edge cases
 
-# Example usage
-r = 5
-area, circumference = circle_properties(r)
-
-print("Radius:", r)
-print("Area:", round(area, 2))
-print("Circumference:", round(circumference, 2))
+    for r in test_radii:
+        result = circle_properties(r)
+        print(f"Radius: {r}")
+        print(f"Result: {result}")
+        print("-" * 30)