From 739aeea6c065e0c6c2eb89bcaff6a5544762ba22 Mon Sep 17 00:00:00 2001
From: nihals007 <https://github.com/nihals007>
Date: Mon, 16 Feb 2026 22:43:35 +0530
Subject: [PATCH] Improve factorial implementation with edge case handling and
 documentation

---
 Factorial with Edge Case Handling | 39 +++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/Factorial with Edge Case Handling b/Factorial with Edge Case Handling
index 880d9b4..6104483 100644
--- a/Factorial with Edge Case Handling	
+++ b/Factorial with Edge Case Handling	
@@ -1,11 +1,30 @@
-try:
-    n = int(input())
+import math
+
+def calculate_factorial(n: int) -> int:
+    """
+    Returns the factorial of a non-negative integer.
+
+    Parameters:
+        n (int): A non-negative integer
+
+    Returns:
+        int: Factorial of n
+
+    Raises:
+        ValueError: If n is negative
+    """
     if n < 0:
-        print("Factorial not defined for negative numbers")
-    else:
-        fact = 1
-        for i in range(1, n + 1):
-            fact *= i
-        print(fact)
-except ValueError:
-    print("Invalid input")
+        raise ValueError("Factorial not defined for negative numbers")
+    return math.factorial(n)
+
+
+try:
+    user_input = input("Enter a non-negative integer: ")
+    number = int(user_input)
+
+    result = calculate_factorial(number)
+    print(f"Factorial of {number} is {result}")
+
+except ValueError as e:
+    print(f"Error: {e}")
+