From 0b95faaafaf94a1ab176b6bfc67b1243035a32bf Mon Sep 17 00:00:00 2001
From: Arun Kishore Voleti
 <49097688+ArunKishoreVoleti@users.noreply.github.com>
Date: Tue, 14 Oct 2025 15:10:38 +0530
Subject: [PATCH 1/2] Add is_even_using_shift_operator function

Introduces a new function to check if a number is even using bitwise shift operators. Includes docstring with explanation and doctest examples.
---
 bit_manipulation/is_even.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/bit_manipulation/is_even.py b/bit_manipulation/is_even.py
index 6f95a1160797..64d638dead1d 100644
--- a/bit_manipulation/is_even.py
+++ b/bit_manipulation/is_even.py
@@ -30,6 +30,40 @@ def is_even(number: int) -> bool:
     """
     return number & 1 == 0
 
+def is_even_using_shift_operator(number: int) -> bool:
+    """
+    Returns True if the input integer is even.
+
+    Explanation:
+    In binary, even numbers end with 0, odd numbers end with 1.
+    Examples:
+    2  -> 10
+    3  -> 11
+    4  -> 100
+    5  -> 101
+
+    For odd numbers, the last bit is always 1.
+    Using shift:
+    (n >> 1) << 1 removes the last bit.
+    If result equals n, n is even.
+
+    >>> is_even_using_shift_operator(1)
+    False
+    >>> is_even_using_shift_operator(4)
+    True
+    >>> is_even_using_shift_operator(9)
+    False
+    >>> is_even_using_shift_operator(15)
+    False
+    >>> is_even_using_shift_operator(40)
+    True
+    >>> is_even_using_shift_operator(100)
+    True
+    >>> is_even_using_shift_operator(101)
+    False
+    """
+    return (number >> 1) << 1 == number
+
 
 if __name__ == "__main__":
     import doctest

From f90c1f819f7c710a9ec06320301ccb8c2e40ff9b Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Tue, 14 Oct 2025 09:43:25 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 bit_manipulation/is_even.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bit_manipulation/is_even.py b/bit_manipulation/is_even.py
index 64d638dead1d..0f64ccab9bde 100644
--- a/bit_manipulation/is_even.py
+++ b/bit_manipulation/is_even.py
@@ -30,6 +30,7 @@ def is_even(number: int) -> bool:
     """
     return number & 1 == 0
 
+
 def is_even_using_shift_operator(number: int) -> bool:
     """
     Returns True if the input integer is even.