EDUCBA

EDUCBA

MENUMENU
  • Free Tutorials
  • Free Courses
  • Certification Courses
  • 600+ Courses All in One Bundle
  • Login
Home Software Development Software Development Tutorials Software Development Basics Binary Search JavaScript
Secondary Sidebar
Software Development Basics
  • Basics
    • Microsoft Expression Web
    • IDE
    • Microsoft Flow
    • Unity Dashboard
    • Servlet Dispatcher
    • Types of Algorithms
    • Vue.js? nextTick
    • Vue.js Transition
    • Page Replacement Algorithms
    • What is CLI
    • Open Source Software
    • Solve Problems With Technology (Simple)
    • What is Application Software & Types
    • Microsoft Word Alternative
    • ADDIE Model
    • V-model advantages and disadvantages
    • Gatsby Plugins
    • Putty version
    • Xampp versions
    • Avro converter
    • Avro Data Types
    • Avro Schema Evolution
    • Avro Serialization
    • Cloudera Impala
    • Cloudera Careers
    • Entity Framework Core
    • Gulp File Include
    • Gulp Autoprefixer
    • Gulp File
    • Gulp Terser
    • System Software Tools
    • System Software Components
    • Typography App
    • Software as a Service (Saas)
    • Icon Font Pack
    • Interpret Results Using ANOVA Test
    • Blogging Insights Your Analytics
    • Increase Productivity Technology
    • Free Multimedia Software
    • Information Technology Benefits
    • What is SPSS and How Does It Work
    • Learn to Code For Beginners (Advance)
    • Uses of Coding
    • Uses Of Raspberry Pi
    • What Is System Design
    • Introduction to NLP
    • What is MapReduce
    • What is SoapUI
    • What is MVC
    • What is Multithreading
    • What is Neural Networks
    • What is Swift
    • What is PLC
    • What is Open Cart
    • What is Mainframe
    • What is JMS
    • What is Cognos
    • What is Open Source
    • What is Bot
    • What is SOAP
    • What is COBOL
    • What is GraphQL
    • What is Microcontroller
    • What is Open-Source License
    • What is Visual Studio Code
    • What is Pandas
    • What is Hypervisor
    • What is Common Gateway Interface
    • What is IDE?
    • What is MVC Design Pattern
    • What is Application Server
    • What is GPS
    • What is Botnet
    • What is Assembly Language
    • System Analysis And Design
    • HTTP Caching
    • What is Buffer Overflow
    • What is Ajax
    • What is Appium
    • What is SVN
    • What is SPSS
    • What is WCF
    • What is Groovy
    • What is Clickbait
    • What is SOA
    • What is GUI
    • What is FreeBSD
    • What is WebSocket
    • What is WordPress
    • What is OSPF
    • What is Coding
    • What is Raspberry Pi
    • HTTP Cookies
    • What is Hub?
    • What is Bridge
    • What is Switch
    • What is Internet Application
    • What is Sensors
    • What is Proximity Sensors
    • What is Full Stack
    • System Design Interview Questions
    • What is Salesforce technology
    • What is Salesforce Sales Cloud
    • What is OOP
    • What is CMD
    • What is React
    • React Redux Typescript
    • What is DSS
    • What is SVG
    • SVG File
    • Bash Sleep Command
    • What is MTU
    • What is Apex
    • What is Desktop Software
    • Tor Browser, Anonymity and Other Browsers
    • Avoid Pitfalls of Shadow IT
    • Freelance Web Graphic Designer
    • What is Storage Virtualization
    • What is Web Services?
    • What is Social Networking?
    • What is Microservices Architecture?
    • Microservices Tools
    • Advantages of Microservices
    • Uses of Internet
    • Software Platforms
    • Uses of Internet for Business
    • Architecture of Web Services
    • Web Application Testing
    • Advantages of Web Service
    • CPU Virtualization
    • Types of Web Services
    • Web Services Testing
    • What is RabbitMQ?
    • RabbitMQ Architecture
    • Advantages of Bitcoin
    • LINQ foreach
    • Penetration Testing Services
    • Puppet Alternatives
    • What is Memcached?
    • What is Browser?
    • Types of Satellites
    • Model Driven Architecture
    • Types of Variables in Statistics
    • Integration Architecture
    • What is API Integration?
    • What is Grid Computing?
    • Asus File Manager
    • What is GPRS?
    • What is Gradle?
    • What is Basecamp?
    • Software System Architecture
    • GSM Architecture
    • What is Nagios?
    • AppDynamics Tool
    • Logical Architecture
    • What is Microsoft Planner
    • What is Circuit Switching
    • What is ARM?
    • Embedded Control Systems
    • Embedded System Programming
    • Embedded System Development
    • Embedded Systems Software
    • Embedded System Project
    • Types of Embedded Systems
    • Requirement Engineering
    • Types of Engineering
    • What is WAP
    • What is Registry?
    • What is Dynatrace?
    • What is Digital Forensics?
    • Hardware Virtualization
    • AppDynamics Careers
    • Bandwidth Monitoring Tools
    • Ping Monitor Tools
    • Dynatrace Tools
    • What is Trello?
    • What is AppDynamics?
    • What is Remote Desktop?
    • What is Extranet?
    • What is LTE Network?
    • What is Firebase?
    • Website Monitoring Tool
    • Number Systems
    • Service Desk Manager
    • Static Website
    • Dynamic Website
    • What is Email?
    • What is URL Link?
    • What is Program?
    • What is Lock Screen?
    • What is Grafana
    • Unguided Media Transmission
    • IT Governance
    • IT Governance Framework
    • Remote Support Softwares
    • What is Unification?
    • Topological Map
    • What is LAMP?
    • USB Flash Drive
    • Software Development Models
    • Digital Circuit
    • What is Webpack?
    • Fault Tolerance
    • What is DSL Modem?
    • What is Mozilla Firefox?
    • What is Vagrant?
    • Types of Research Methodology
    • Grafana Plugins
    • Ionic Components
    • Nginx Error_page
    • Nginx Include
    • Nginx Version
    • Nginx Force HTTPS
    • Nginx Environment Variables
    • Nginx Container
    • RabbitMQ Routing Key
    • CakePHP
    • Telegram Features
    • What is CDN
    • RethinkDB
    • Symfony Version
    • UWP
    • cPanel version
    • What is assembly?
    • Seed7
    • Switching Techniques
    • OCaml
    • Pseudocode?Algorithm
    • Quality Control Methods
    • What is OneNote?
    • Workstation Uses
    • Soft Computing Techniques
    • Remote Access Software
    • Remote Desktop Tools
    • OneNote Shortcuts
    • Software Review
    • What is Qubit?
    • Static Analysis Tools
    • Register in Microprocessor
    • What is VDI?
    • What is Svelte?
    • RabbitMQ Version
    • Groovy Version
    • Code Walkthrough
    • What is Telegram?
    • Gradle Version
    • What is Recycle Bin?
    • What is Cordova?
    • Swagger version
    • Doxygen
    • Phalcon
    • Metasploit Framework
    • Microsoft Word Shortcut Keys
    • Wordpad shortcut keys
    • Burp Suite
    • Google Docs Shortcuts
    • Install VPN
    • Frontend Challenges
    • CodeIgniter Version
    • VMware Tools
    • CDMA Advantages
    • CDMA Uses
    • Servlet Session Management
    • ServletConfig
    • Servlet Class
    • Log4j Version
    • Remote Desktop Softwares
    • Soapui Load Test
    • Scikit Learn Version
    • VMware Benefits
    • Google Slides Shortcuts
    • What is XAMPP?
    • What is PyGTK?
    • VMware Fusion
    • What is cPanel?
    • Ubuntu Version
    • Server Types
    • App Analytics Tools
    • DNS Types
    • Evernote Features
    • Restful architecture
    • GNOME Keyboard Shortcuts
    • AngelScript
    • NativeScript Layouts
    • PowerPoint Version
    • setInterval Function
    • Shopify Apps
    • TypeScript foreach loop
    • Socio Technical System
    • PowerPoint Shortcut Keys
    • Civil Engineering Tools
    • OpenLayers vs Leaflet
    • Circuit Switching Advantages and Disadvantages
    • LotusScript
    • Multiplexer
    • Multiple Access Protocol
    • Types of Broadband
    • What is Standardization
    • Methods of Development
    • Software Requirement Specification
    • CentOS restart network
    • Bouncy numbers
    • Burp suite proxy
    • Redshift window functions
    • Mesh Topology Advantages and Disadvantages
    • What is Zabbix?
    • Test Techniques
    • Test Development
    • What is PyCharm
    • What is REST
    • JDBC version
    • System software features
    • Ableton versions
    • Unreal engine version
    • RAD advantage disadvantage
    • Incremental Model Advantage and Disadvantage
    • Disadvantages of Internet
    • What is VoIP
    • WAP Architecture
    • CentOS unzip
    • Cubase Shortcuts
    • Cubase Versions
    • Libreoffice shortcut keys
    • Archiving Software
    • Layered Architecture
    • Coverage Types
    • What is Kivy?
    • Types of Methodology
    • Swift JSON
    • JSON Serialize
    • TypeScript?boolean
    • TypeScript keyof object
    • TypeScript RegEx
    • TypeScript?date
    • TypeScript object
    • CentOS Version
    • XSLT if else
    • Binary Search JavaScript
    • Binary search with recursion
    • PLSQL Replace
    • Evernote Notes
    • Rust vs Python
    • Test Scenario
    • Deadlock in Operating System
    • MVVM Architecture
    • MVVM Flutter
    • What is Keyboard
    • WordPress Hosting
    • Software requirement
    • CentOS Add User to Group
    • Backup Types
    • Firewall Rules
    • Microprocessor Features
    • Maven Versions
    • OneNote features
    • Binary search tree insertion
    • Quick sort algorithm
    • B+ tree insertion
    • What is Automation?
    • What is Digital Electronics?
    • Wireless Transmission Media
    • Border Gateway Protocol
    • Email Encryption Software
    • Endpoint Encryption
    • Outlook Alternative
    • What is Abacus
    • Encapsulation Benefits
    • FL Studio Keyboard Shortcuts
    • NordVPN Features
    • Statsmodels API
    • Statsmodels Linear Regression
    • Buzz number
    • Krishnamurthy Number
    • What is Compact Disc?
    • Bucket Sort Algorithm
    • Insertion Sort Algorithm
    • Redis Version
    • Chatbot Benefits
    • Full Stack Technologies
    • Civil Engineering Types
    • Tomcat Web Server
    • Tomcat Native
    • Tkinter Scrolledtext
    • Anaconda Navigator
    • UML Class Diagram
    • System Monitoring Tool
    • Drupal Features
    • Drupal Free Themes
    • Drupal Modules
    • Drupal 9
    • Drupal Developer
    • Drupal Webform
    • Drupal 8
    • Drupal 8 Themes
    • Drupal Views
    • System Software Functions
    • What is Linker?
    • What is K Map?
    • Website Testing Tool
    • TypeScript map
    • TypeScript enum
    • TypeScript class
    • Hill Climbing Algorithm
    • Hashmap and Hashtable
    • Nexus Plugin
    • Entity Framework Delete by ID
    • What is NumPy?
    • What is NLP?
    • Vishing Attack
    • Test Plan in Software Testing
    • Guest Mode
    • What is Mockito?
    • Advantage of the Internet
    • SVG Creator
    • Rails Logger
    • Intellij Plugins
    • Intellij Shortcuts
    • IntelliJ Maven
    • IntelliJ JavaFX
    • IntelliJ Lombok Plugin
    • IntelliJ Format Code
    • IntelliJ gitignore
    • IntelliJ Find and Replace
    • RESTEasy

Related Courses

Software Testing Training

Selenium Training Certification

Appium Training

JMeter Certification Training

Binary Search JavaScript

Binary Search JavaScript

Introduction of Binary Search JavaScript

Binary Search JavaScript is a searching technique that works on the Divide and Conquers approach. As searching is one of the most commonly performed tasks in the IT field, many data structures and algorithms exist now to make searching much more efficient. Binary search means Half Interval Search; it finds specific elements located in the array i.e. works with only sorted arrays. It is more advantageous than Linear Search Algorithm based on fastness and more efficiency comparatively. Binary Search is a very simple, efficient, and intuitive searching algorithm but one of the limitations is that works only for sorted arrays, hence, this requires some pre-processing before implementing a Binary search of the array. Let us look at How Binary search works, along with its Algorithm and a few examples.

Syntax of Binary Search JavaScript

Basically, any search algorithms would not have Syntax as such but will follow a flow i.e. Flowchart or an Algorithm steps to implement.

Algorithm:

Step 1: First, we need to find the middle element of the array

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

Step 2: Then, start comparing the middle element with the value which is being searched for i.e. key element

  1. If the key element is less than that of the middle element, start searching in the left half of the array
  2. If the key element is more than that of the middle element, start searching in the right half of the array
  3. If the key element is equal to the middle element, return the index of the middle element

Step 3: Continue the above steps until there is a single element left

Step 4: If the key element is not found, then return -1

To understand the above algorithm in a better way, we shall take an example.

Input array: 2 4 6 8 10 12 14 16 18 20 22

Key element: 16

  • Now, let us check for the middle element of the array, i.e. 12
  • Will compare 12 with 16: As 16>12, we shall ignore the left part and start searching the right half.
  • So, array will be 14 16 18 20 22
  • Now, the middle element will be 18.
  • Let us compare 18 with 16, As 16<18, we shall ignore the right half and go with the left part.
  • So, array will have only two elements i.e 14, 16
  • As there are only two elements left in the array, we shall go with the middle element as 14.
  • Let us compare now, 16>14, only the right part of the array is considered and the left part is ignored.
  • Now, we are left with a single element in the array i.e. 16.
  • Compare key element with array element now, 16=16, which means the key element is found As seen in the above example, very few comparisons were done to find the key element.

Example of Binary Search JavaScript

Following are the examples are given below:

All in One Software Development Bundle(600+ Courses, 50+ projects)
Python TutorialC SharpJavaJavaScript
C Plus PlusSoftware TestingSQLKali Linux
Price
View Courses
600+ Online Courses | 50+ projects | 3000+ Hours | Verifiable Certificates | Lifetime Access
4.6 (86,452 ratings)

Example #1

Binary Search Algorithm in JavaScript in Recursive approach

Code:

<!DOCTYPE html>
<html>
<body>
<h2>Binary Search in JavaScript</h2>
<script>
let binarySearch = function (inputArray, x, startEle, endEle) {
if (startEle>endEle) return false;
let midEle=Math.floor((startEle + endEle)/2);
if (inputArray[midEle]===x) return true;
if(inputArray[midEle] > x)
return binarySearch(inputArray, x, startEle, midEle-1);
else
return binarySearch(inputArray, x, midEle+1, endEle);
}
let inputArray = [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22];
let x = 16;
if (binarySearch(inputArray, x, 0, inputArray.length-1))
document.write("Element " + x + " found in input array!<br>");
else document.write("Element " + x + " is not found in the input array!<br>");
x = 9;
if (binarySearch(inputArray, x, 0, inputArray.length-1))
document.write("Element " + x + " found in input array!<br>");
else document.write("Element " + x + " is not found in the input array!<br>");
</script>
</body>
</html>

Output:

Binary Search JavaScript-1.1

Here you can see that the above example which we had solved manually, have given the same input array for the program and the output is as required.

Example #2

Binary Search Algorithm in Iterative manner

Code:

<!DOCTYPE html>
<html>
<body>
<h2>Binary Search in JavaScript</h2>
<script>
constbinaryalgo = (listArray, key) => {
let lowVal = 0
let highVal = listArray.length - 1
while (lowVal<= highVal) {
constmidVal = Math.floor((lowVal + highVal) / 2)
const x = listArray[midVal]
if (x === key) {
return midVal
}
if (x > key) {
highVal = midVal - 1
} else {
lowVal = midVal + 1
}
}
return null
}
document.write("Element is found at index " + binaryalgo([3, 1, 5, 4, 6 ,7, 5, 9, 10], 5) + "<br>");
document.write("Element is found at index " + binaryalgo([3, 1, 5, 4, 6 ,7, 5, 9, 10], 2) + "<br>")
document.write("Element is found at index " + binaryalgo([3, 1, 5, 4, 6 ,7, 5, 9, 10], 10) + "<br>")
</script>
</body>
</html>

Output:

With the input array given, and the key element to be searched, if there is no value available, it will return -1 or null as provided.

Binary Search JavaScript-1.2

Efficiency of Binary Search Algorithm

  • Time complexity of Binary search is O(log2n) where n=no. of elements in the array.
  • This time complexity is far better than Linear Search, which actually has a time complexity of O(n).
  • Binary search works directly on the original array without creating any copies.
  • As Binary search needs a sorted array, and hence the time complexity of O(nlogn) is applicable.
  • If the array is small in length, then a brute force algorithm can be applied as a better approach.

Conclusion

With this, we shall conclude the topic “Binary Search JavaScript”. We have seen what Binary search means and how is it implemented using an algorithm. We have also manually solved an example and also the same example we did an implementation programmatically. Two type of approaches have been implemented, i.e. Recursive and Iterative approaches. We have also seen the Time complexity taken by Binary search over linear search.

Recommended Articles

This is a guide to Binary Search JavaScript. Here we also discuss the introduction and syntax of binary search javascript along with different examples and its code implementation. You may also have a look at the following articles to learn more –

  1. Dart vs JavaScript
  2. Sort string in JavaScript
  3. JavaScript Modulo
  4. JavaScript hash()
Popular Course in this category
JavaScript Training Program (39 Courses, 24 Projects, 4 Quizzes)
  39 Online Courses |  24 Hands-on Projects |  230+ Hours |  Verifiable Certificate of Completion
4.5
Price

View Course

Related Courses

Software Testing Training (11 Courses, 2 Projects)4.9
Selenium Automation Testing Training (11 Courses, 4+ Projects, 4 Quizzes)4.8
Appium Training (2 Courses)4.7
JMeter Testing Training (3 Courses)4.7
0 Shares
Share
Tweet
Share
Primary Sidebar
Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Live Classes
  • Corporate Training
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Java Tutorials
  • Python Tutorials
  • All Tutorials
Certification Courses
  • All Courses
  • Software Development Course - All in One Bundle
  • Become a Python Developer
  • Java Course
  • Become a Selenium Automation Tester
  • Become an IoT Developer
  • ASP.NET Course
  • VB.NET Course
  • PHP Course

ISO 10004:2018 & ISO 9001:2015 Certified

© 2022 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

EDUCBA
Free Data Science Course

SPSS, Data visualization with Python, Matplotlib Library, Seaborn Package

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA Login

Forgot Password?

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA
Free Data Science Course

Hadoop, Data Science, Statistics & others

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

Let’s Get Started

By signing up, you agree to our Terms of Use and Privacy Policy.

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

Loading . . .
Quiz
Question:

Answer:

Quiz Result
Total QuestionsCorrect AnswersWrong AnswersPercentage

Explore 1000+ varieties of Mock tests View more