Update power.py

Author: MaximSmolskiy

divide_and_conquer/power.py

@@ -32,6 +32,17 @@ def power(a: int, b: int) -> float:
     :param a: The base (integer).
     :param b: The exponent (integer).
     :return: The result of a^b, as a float for negative exponents.
+
+    >>> power(4,6)
+    4096
+    >>> power(2,3)
+    8
+    >>> power(-2,3)
+    -8
+    >>> power(2,-3)
+    0.125
+    >>> power(-2,-3)
+    -0.125
     """
     if b < 0:
         return 1 / actual_power(a, -b)