# What is Bit Manipulation?

Bit manipulation is algorithmically manipulating bits or other pieces of data shorter than a word. Bit manipulation is something that has constant time complexity.

Bit manipulation is algorithmically manipulating bits or other pieces of data shorter than a word. Bit manipulation is something that has constant time complexity. This tutorial explains the basics and why Bitwise operators are used in programming.

## Introduction

Bit manipulation applies logical operations on a sequence of bits to achieve a required result. It algorithmically manipulates bits or other pieces of data shorter than a word.

Computer programming tasks that require bit manipulation include:

• Low-level device control
• Error detection and correction algorithms
• Data compression
• Encryption algorithms
• Optimization

For most other tasks, modern programming languages allow the programmer to work directly with abstractions instead of bits representing those abstractions.

Bit manipulation can obviate or reduce the need to loop over a data structure and speed up coding as bit manipulations are processed in parallel.

Throughout the course, we offer many examples to help you understand the patterns in solving bit manipulation algorithmic problems.

The problems solved under these patterns use a varied set of algorithmic techniques that you will encounter day to day.

We will start with a brief introduction to each topic before jumping into practice problems. Under each subject, the first problem will explain the underlying pattern in detail to build the concepts that can be applied to later problems. The later problems will focus on each problem’s different constraints and how our algorithm needs to change to handle them.

Let’s start to understand the essential concepts of Bitwise operators.

## Bit-level operations

• Sometimes, it becomes mandatory to consider data at the bit level.
• We have to operate on the individual data bit. We must also turn on/off particular data bits during source code drafting. At that time, we must use a bitwise operator to make our task more manageable.
• C/Java programming provides us with different bitwise operators for manipulating bits.
• Bitwise operators operate on integers and characters but not on data types float or double.
• Using Bitwise operators, we can easily manipulate individual bits.
• C/Java programming supports six bitwise operators.

## List of Bitwise operators

Operator Name of operator Operator uses
& Bitwise AND Used to mask particular parts of the byte
| Bitwise OR
~ One's complement / NOT Used to turn a bit ON/OFF
^ Bitwise XOR
<< Left Shift Used to shift the bit to the left
>> Right Shift Used to shift the bit to the right
Bit ManipulationCoding Interviews

Gopi is a highly experienced Full Stack developer with a deep understanding of Java, Microservices, and React. He worked in India & Europe for startups, the EU government, and tech giants.

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## Solution Review: Get the First Set Bit Position Using the Right Shift

In the kth bit set/unset problem, we first write the algorithm, then some pseudocode, and then implement the solution.

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## Challenge 1: Get the First Set Bit Position Using the Right Shift

This problem is similar to the last lesson we discussed. If you need a clue, return to the previous lesson to further your understanding.

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## Check If Kth Bit Is Set/Unset Using Right Shift

In the kth bit set/unset problem, we need to write a program that checks whether the kth bit of a number is 1 or 0.