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Sum of Two Integers

MediumUpdated: Sep 19, 2025
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LeetCode
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Problem

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.

Follow up

Write a function Add(a, b) that returns the sum of two integers without using any arithmetic operators (+, -, *, /, ++, --, etc.). Use only bitwise operators and shifts where needed.

Examples

Example 1

Input: a = 1, b = 2
Output: 3
Similar Problems

Solution

See Method 1 and Method 2 of [Sum of two numbers using only bitwise operators](sum-of-two-numbers-using-only-bitwise-operators), and here is the video explaining this method in detail. Please check it out:

<div class="youtube-embed"><iframe src="https://www.youtube.com/embed/NJLGft5fS2Y" frameborder="0" allowfullscreen></iframe></div>

Continue Practicing

Sum of two numbers using only bitwise operatorsMediumAdd Two IntegersEasyAdd two numbers without using the plus operatorHard

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