Reverse of a user input number with best time complexity

reverse_number.py

@@ -1,29 +1,16 @@
 """This file has the function which reverses real integer."""
-
-
-def reverse_number(number: int) -> int:
-    """
-    This function reverses a number where number can be real integer
-    """
-    if number == 0:
-        return 0
-
-    sign = 1 if number > 0 else -1
-    number = abs(number)
-    reverse = 0
-    while number > 0:
-        current_digit = number % 10
-        reverse = reverse * 10 + current_digit
-        number //= 10
-    return reverse if sign == 1 else reverse * -1   
-
-N = 567
-print(reverse_number(N))
-
-
-N = 0
-print(reverse_number(N))
-
-
-N = -35670
-print(reverse_number(N))
+'''Reverse of a user input number with best time complexity'''
+
+def reverse_number(n):
+    reversed_num = 0
+    while n > 0:
+        reversed_num = reversed_num * 10 + n % 10
+        n //= 10
+    return reversed_num
+
+try:
+    num = int(input("Enter a number: "))
+    reversed_num = reverse_number(num)
+    print("Reverse of", num, "is", reversed_num)
+except ValueError:
+    print("Invalid input. Please enter a valid number.")