JavaScript Programs Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report JavaScript Programs contains a list of articles based on programming. This article contains a wide collection of programming articles based on Numbers, Maths, Arrays, Strings, etc., that are mostly asked in interviews.Table of ContentJavaScript Basic ProgramsJavaScript Number ProgramsJavaScript Math ProgramsJavaScript Array ProgramsJavaScript String ProgramsJavaScript Linked List ProgramsJavaScript Object ProgramsJavaScript Date ProgramsJavaScript Set and Map ProgramsJavaScript Basic ProgramsThis section contains basic programming articles for beginners.S. No.Articles1JavaScript Program to Add Two Numbers2JavaScript Program for Multiplication of Two Numbers3JavaScript Program to Add Float Numbers4JavaScript Program to Check if a Number is Odd or Even5JavaScript Program to Check if a Number is Positive, Negative, or Zero6JavaScript Program to Swap Two Variables7JavaScript Program to Find the Sum of Natural Numbers8JavaScript Program for Armstrong Numbers9JavaScript Program to Check for Palindrome Number10JavaScript Program to Find the Area of Triangle11JavaScript Program to Convert Celsius to FahrenheitJavaScript Number ProgramsThis section contains wide collection of Number based programs. JavaScript Number contains different types of numbers and their values.S. No.Articles1JavaScript Program to Generate Random Number in Given Range2Javascript Program to Check Prime Number3JavaScript Program to Find Largest of Three Numbers4JavaScript Program to Print All Prime Numbers in an Interval5JavaScript Program to Check if Two Numbers have Same Last Digit6JavaScript Program to Guess Number7JavaScript Program to Split a Number into Individual Digits8JavaScript Program to Find the Missing Number9JavaScript Program to Find the Factors of a Number10JavaScript Program to Print All Prime Numbers in an IntervalJavaScript Math ProgramsThis section contains wide collection of Mathematical based programs. JavaScript Maths contains mathematical operation on numbers.S. No.Articles1JavaScript Program to Compute Power of a Number2JavaScript Program to Find the Square Root3JavaScript Program to Solve Quadratic Equations4Program to Convert Km/hr to miles/hr and vice versa5JavaScript Program for Factorial of a Number6JavaScript Program to Print Multiplication Table of a Number7JavaScript Program to Print Fibonacci Series8JavaScript Program to Find GCD or HCF of Two Numbers9JavaScript Program to Find LCM of Two Numbers10JavaScript Program to Find the Factors of a Number11JavaScript Program to Shuffle Deck of Cards12JavaScript Program to Display Fibonacci Sequence Using Recursion13JavaScript Program to Find Factorial of a Number using Recursion14JavaScript Program to Convert Decimal to Binary15JavaScript Program to Find Sum of Natural Numbers using Recursion16JavaScript Program to Convert a Float Number to Whole Number17JavaScript Program to Find the Quotient and Remainder by Dividing an Integer18JavaScript Program to Convert a Negative Number to Positive19JavaScript Program to Round off a Number to Next Multiple of 520JavaScript Program to Find Factorial of a Number21JavaScript Program to Perform Simple Mathematical Calculation22JavaScript Program to Calculate nPr (Permutations)JavaScript Array ProgramsThis section contains wide collection of articles based on array programming. JavaScript Array is a single variable that is used to store elements of different data types. JavaScript arrays are zero-indexed.S. NoArticles1JavaScript Program to Get the First and Last Item in an Array2JavaScript Program to Add New Elements at the Beginning of an Array3JavaScript Program to Remove Elements from an Array4JavaScript Program to Reverse an Array5JavaScript Program to Empty an Array6JavaScript Program to Check Whether an Array Includes a Particular Value or Not7JavaScript Program to Insert an Item into an Array at Specific Index8JavaScript Program to Convert a Number into Array9JavaScript Program to Find the Sum of All Elements of Given Array10JavaScript Program to Sort Words in Alphabetical Order11JavaScript Program to Remove Duplicate Elements from an Array12JavaScript Program to Find Common Items from Two Arrays13JavaScript Program to Replace an Item from an Array14JavaScript Program to Check Object is an Array or Not15JavaScript Program to Generate a Range of Numbers and Characters16JavaScript Program to Find Duplicate Elements in an Array17JavaScript Program to Sort Numeric Array18JavaScript Program to Remove Duplicate Elements from an Array19JavaScript Program to Get All Unique Values (Remove Duplicates) in an Array20JavaScript Program to Add Elements to an Existing Array Dynamically21JavaScript Program to Merge Two Arrays and Remove Duplicate Items22JavaScript Program to Sort Array of Objects by String Property Value23JavaScript Program to Create Two Dimensional Array24JavaScript Program to Splice an Array Without Mutating the Original Array25JavaScript Program to Extract Value of a Property as Array from Array of Objects26JavaScript Program to Compare Two Arrays27JavaScript Program to Select a Random Element from Array28JavaScript Program to Create an Array using Intersection of two Arrays29JavaScript Program to Split an Array into Chunks30JavaScript Program to Convert Comma Separated String to Array31JavaScript Program to Copy Array Items into Another Array32JavaScript Program to Find the Array Index with a Value33JavaScript Program to Merge Two Arrays and Remove Duplicate Items34JavaScript Program to Count Occurrences of All Items in an Array35JavaScript Program to Filter the Non-unique Values in an Array36JavaScript Program to Get N Largest Elements from an Array37JavaScript Program to Clone an Array38JavaScript Program to find Smallest Difference Triplet from Three Arrays39JavaScript Program to Find Shortest Distance Between Two Words in an Array of Words40JavaScript Program to Find the Most Frequently Occurring Element in an Array41JavaScript Program to Find Maximum Profit by Buying and Selling a Share at Most Twice using Array42JavaScript Program to Calculate the Cumulative Sum of Elements in an Array43JavaScript Program to Merge Two Arrays Without Creating a New Array44JavaScript Program for K-th Largest Sum Contiguous Subarray45JavaScript Program to Construct an Array from its pair-sum Array46JavaScript Program to Check if an Array Contains only Unique Values47JavaScript Program to Find the Most Frequent Element in an Array48JavaScript Program for Left Rotate by One in an Array49Find the Rotation Count in Rotated Sorted array in JavaScriptJavaScript String ProgramsThis section contains the wilde collection of articles based on String programs. JavaScript String Object is a sequence of characters. It contains zero or more characters within single or double quotes.S. No.Articles1JavaScript Program to Count Words of a String2JavaScript Program to Check if a String Contains any Whitespace Characters3JavaScript Program to Reverse a String4JavaScript Program to Replace All Occurrences of a String5JavaScript Program to Check if a String Starts With Another String6JavaScript Program to Create Multi Line Strings7JavaScript Program to Format Numbers as Currency String8JavaScript Program to Trim a String at Beginning or Ending9JavaScript Program to Delete First Character of a String10JavaScript Program to Get the Last Character of a String11JavaScript Program to Convert an Object to String12JavaScript Program to Check Whether a String Contains a Substring13JavaScript Program to Compare Strings14JavaScript Program to Encode/Decode String to Base6415JavaScript Program to Replace Characters of a String16JavaScript Program to Check Whether a Passed String is Palindrome or Not17JavaScript Program to Replace Characters of a String18JavaScript Program to Get the Number of Occurrences of Each Letter in Specified String19JavaScript Program to Generate a Random String20JavaScript Program to Make First Letter of a String Uppercase21JavaScript Program to Get the Number of Vowels in a String22JavaScript Program to Remove Spaces from a String23JavaScript Program to Count String Occurrence in String24JavaScript Program to Compare the Case Insensitive Strings25JavaScript Program to Generate All Combinations of a String26JavaScript Program to Find Unique Characters of a String27JavaScript Program to Convert User Input String into Regular Expression28JavaScript Program to Convert Comma Separated String to Array29JavaScript Program to Strip All Non-numeric Characters from String30JavaScript Program to Convert String to Title Case31JavaScript Program to Remove All Non-ASCII Characters from the String32JavaScript Program to Convert String into Float33JavaScript Program to Check Whether a String Contains a Substring34JavaScript Program to Split Multiline String into an Array of Lines35JavaScript Program to Find the Longest Word Within the String36JavaScript Program to Get Nth Occurrence of a String37JavaScript Program to Replace All Dots in a String38JavaScript Program to Check a Given String is an Anagram of Another String39JavaScript Program to Check if String Follows Order of Characters Defined by a Pattern or Not40JavaScript Program to Extract Email Addresses from a String41JavaScript Program to Check if a String Contains Any Digit Characters42JavaScript Program to Count the Occurrences of Each Character43JavaScript Program to Find i’th Index Character in a Binary String Obtained After n Iterations44JavaScript Program to find Smallest and Largest Word in a String45JavaScript Program to Find Minimum Number of Manipulations to Make Two Strings Anagram Without Deletion of Character46JavaScript Program to Get All Substrings of the Given StringJavaScript Linked List ProgramsThis section contains wide collection of articles based on Liked list data structure in JavaScript. A linked list is a linear data structure, in which the elements are not stored at contiguous memory locations.S. No.Articles1JavaScript Program to Implement a Linked List2JavaScript Program For Searching An Element In A Linked List3JavaScriptt Program For Inserting A Node In A Linked List4JavaScript Program For Inserting Node In The Middle Of The Linked List5JavaScript Program For Writing A Function To Delete A Linked List6JavaScript Program For Deleting A Linked List Node At A Given Position7JavaScript Program For Finding Length Of A Linked List8JavaScript Program For Rotating A Linked List9JavaScript Program For Making Middle Node Head In A Linked List10JavaScript Program For Removing Duplicates From An Unsorted Linked List11JavaScript Program For Swapping Nodes In A Linked List Without Swapping Data12JavaScript Program To Delete Middle Of Linked List13JavaScript Program To Delete Alternate Nodes Of A Linked List14JavaScript Program For Finding Intersection Point Of Two Linked Lists15JavaScript Program For Finding The Middle Element Of A Given Linked List16JavaScript Program For Cloning A Linked List With Next And Random Pointer In O(1) Space17JavaScript Program For Cloning A Linked List With Next And Random Pointer-Set 218JavaScript Program For Reversing Alternate K Nodes In A Singly Linked List19JavaScript Program For Deleting A Given Node In Linked List Under Given Constraints20JavaScript Program For Alternating Split Of A Given Singly Linked List- Set 121JavaScript Program For Reversing A Linked List In Groups Of Given Size - Set 122JavaScript Program For Reversing A Linked List In Groups Of Given Size- Set 223JavaScript Program For Writing A Function To Get Nth Node In A Linked List24JavaScript Program For Rearranging A Given Linked List In-Place25JavaScript Program To Check If Two Linked Lists Are Identical26JavaScript Program For Selecting A Random Node From A Singly Linked List27JavaScript Program For Removing Duplicates From A Sorted Linked List28JavaScript Program For Pointing Arbit Pointer To Greatest Value Right Side Node In A Linked List29JavaScript Program For Removing Every K-th Node Of The Linked List30JavaScript Program For Finding The Length Of Loop In Linked List31JavaScript Program For Segregating Even And Odd Nodes In A Linked List 32JavaScript Program For Adding 1 To A Number Represented As Linked List33 JavaScript Program For Adding Two Numbers Represented By Linked Lists- Set 234 JavaScript Program To Check If A Singly Linked List Is Palindrome35JavaScript Program To Find Decimal Equivalent Of Binary Linked List36JavaScript Program To Multiply Two Numbers Represented By Linked Lists37JavaScript Program For Insertion Sort In A Singly Linked List38JavaScript Program For Merge Sort Of Linked Lists39Javascript Program For Finding Intersection Point Of Two Linked Lists39JavaScript Program to Implement Doubly Linked List40JavaScript Program to Traverse Doubly Linked List41JavaScript Program For Insert Operation in Doubly Linked List42JavaScript Program For Rotate Doubly linked list by N nodes43JavaScript Program For Deleting A Node In A Doubly Linked List 44JavaScript Program For Delete Operations in Doubly Linked List45 JavaScript Program For Reversing A Doubly Linked List46 JavaScript Program For Quick Sort On Doubly Linked List47 JavaScript Program For Merge Sort For Doubly Linked ListJavaScript Object ProgramsThis section contains wide collection of articles based on Object programs. JavaScript Objects are important data type and form the building blocks for modern JavaScript.S. No.Articles1JavaScript Program to Create Objects (4 Different Ways)2JavaScript Program to Iterate Over an Object3JavaScript Program to Add an Object to an Array4JavaScript Program to Create Dynamic Values and Objects5JavaScript Program to Get a Key in an Object by its Value6JavaScript Program to Find the Length of an Object7JavaScript Program to Check a Key Exists in Object or Not8JavaScript Program to Get the Last Item of Object9JavaScript Program to Clone an Object10JavaScript Program to Merge Properties of Two Objects Dynamically11JavaScript Program to Count Number of Keys/Properties in an Object12JavaScript Program to Add an Object to an Array13JavaScript Program to Add Key/Value Pair to an Object14JavaScript Program to Sort Array of Objects by String Property Value15JavaScript Program to Convert an Object {} to an Array [] of key-value Pairs16JavaScript Program to Remove Duplicates from an Array of Objects17JavaScript Program to Remove Objects from Associative Array18JavaScript Program to Convert an Object to String19JavaScript Program to Create an Object from Given Key-Value Pairs20JavaScript Program to Remove a Key from Object21JavaScript Program to Find Max/Min Value of an Attribute in an Array of Objects22JavaScript Program to Convert Two-Dimensional Array into an Object23JavaScript Program to Remove Blank Attributes from an Object24JavaScript Program to Change JSON String into an ObjectJavaScript Date ProgramsThis section contains wide collection of articles based on Date object. Javascript Date object in JavaScript is used to represent a moment in time. This time value is since 1 January 1970 UTC (Coordinated Universal Time). S. No.Article 1JavaScript Program to Subtract Days from Date Object2JavaScript Program to Add Hours to the Date Object3JavaScript Program to Convert Date to Number4JavaScript Program to Check a Date is Valid or Not5JavaScript Program to Display Date and Time6JavaScript Program to Get First Day of the Year7JavaScript Program to Check if a Given Year is Leap Year8JavaScript Program to Convert Milliseconds to Date9JavaScript Program to Get the Current Date10JavaScript Program to Compare Two Dates12JavaScript Program to Get Tomorrow's Date in a String Format13JavaScript Program to Calculate Current Week Number14JavaScript Program to Compare Date Part Only Without Comparing Time15JavaScript Program to Check the Input Date is Equal to Today's Date or Not16JavaScript Program to Check One Date is Between Two Dates17JavaScript Program to Format Current Date in MM/DD/YYYY HH:MM:SS Format18JavaScript Program to Convert Seconds to Time String Format hh:mm:ss19JavaScript Program to Validate String Date Format20JavaScript Program to Convert Date to String21JavaScript Program to Convert CFAbsoluteTime to Date Object and Vice-Versa22JavaScript Program to Check for Two Timestamp for the Same Day23JavaScript Program to Check if the Given Date is Weekend24JavaScript Program to Display JavaScript Datetime in 12 Hour AM/PM Format25JavaScript Program to Calculate the Yesterday's Date in JavaScript26JavaScript Program to Get the First and Last Date of Current Month27JavaScript Program to Remove Time from Date28JavaScript Program to Get Month and Date in Two Digit Format29JavaScript Program to Sort an Object Array by Date30JavaScript Program to Get the Relative Timestamp Difference Between Dates31JavaScript Program to Check if Date is Less Than 1 Hour Ago 32JavaScript Program to Calculate Days Left Until Next ChristmasJavaScript Set and Map ProgramsThis section contains wide collection of programming articles based on Set and Map objects. Set is a collection of items that are unique i.e. no element can be repeated. The map is a collection of elements where each element is stored as a Key, value pair.S. No.Articles1JavaScript Program to Sort a Set2JavaScript Program to Iterate Over Set Elements3JavaScript Program to Convert Set to Array4JavaScript Program to Convert Array to Set5JavaScript Program to Perform Intersection of Two Sets6JavaScript Program to Get the Union of Two Sets7JavaScript Program to Order the Elements in a Set8JavaScript Program to Serialize a Map9JavaScript Program to Iterate Over Map Elements10JavaScript Program to Sort a Map11JavaScript Program to Get Key by Value in a Map12JavaScript Program to Update the Value for a Specific Key in Map13JavaScript Program to Add a key/value Pair to Map14JavaScript Program to Combine Values of Two Maps having Same Key15JavaScript Program to Order the Elements in a Map Basic JavaScript Programs Comment More infoAdvertise with us Next Article Introduction to JavaScript K kartik Follow Improve Article Tags : JavaScript Web Technologies JavaScript-DSA JavaScript-Program Similar Reads JavaScript Tutorial JavaScript is a programming language used to create dynamic content for websites. It is a lightweight, cross-platform, and single-threaded programming language. It's an interpreted language that executes code line by line, providing more flexibility.Client Side: On the client side, JavaScript works 11 min read JavaScript BasicsIntroduction to JavaScriptJavaScript is a versatile, dynamically typed programming language that brings life to web pages by making them interactive. It is used for building interactive web applications, supports both client-side and server-side development, and integrates seamlessly with HTML, CSS, and a rich standard libra 4 min read JavaScript VersionsJavaScript is a popular programming language used by developers all over the world. It’s a lightweight and easy-to-learn language that can run on both the client-side (in your browser) and the server-side (on the server). JavaScript was created in 1995 by Brendan Eich.In 1997, JavaScript became a st 2 min read How to Add JavaScript in HTML Document?To add JavaScript in HTML document, several methods can be used. These methods include embedding JavaScript directly within the HTML file or linking an external JavaScript file.Inline JavaScriptYou can write JavaScript code directly inside the HTML element using the onclick, onmouseover, or other ev 3 min read JavaScript SyntaxJavaScript syntax refers to the rules and conventions dictating how code is structured and arranged within the JavaScript programming language. This includes statements, expressions, variables, functions, operators, and control flow constructs.Syntaxconsole.log("Basic Print method in JavaScript");Ja 6 min read JavaScript OutputJavaScript provides different methods to display output, such as console.log(), alert(), document.write(), and manipulating HTML elements directly. Each method has its specific use cases, whether for debugging, user notifications, or dynamically updating web content. Here we will explore various Jav 4 min read JavaScript CommentsComments help explain code (they are not executed and hence do not have any logic implementation). We can also use them to temporarily disable parts of your code.1. Single Line CommentsA single-line comment in JavaScript is denoted by two forward slashes (//), JavaScript// A single line comment cons 2 min read JS Variables & DatatypesVariables and Datatypes in JavaScriptVariables and data types are foundational concepts in programming, serving as the building blocks for storing and manipulating information within a program. In JavaScript, getting a good grasp of these concepts is important for writing code that works well and is easy to understand.Data TypesVariabl 6 min read Global and Local variables in JavaScriptIn JavaScript, understanding the difference between global and local variables is important for writing clean, maintainable, and error-free code. Variables can be declared with different scopes, affecting where and how they can be accessed. Global VariablesGlobal variables in JavaScript are those de 4 min read JavaScript LetThe let keyword is a modern way to declare variables in JavaScript and was introduced in ECMAScript 6 (ES6). Unlike var, let provides block-level scoping. This behaviour helps developers avoid unintended issues caused by variable hoisting and scope leakage that are common with var.Syntaxlet variable 6 min read JavaScript constThe const keyword in JavaScript is a modern way to declare variables, introduced in (ES6). It is used to declare variables whose values need to remain constant throughout the lifetime of the application.const is block-scoped, similar to let, and is useful for ensuring immutability in your code. Unli 5 min read JavaScript Var StatementThe var keyword is used to declare variables in JavaScript. It has been part of the language since its inception. When a variable is declared using var, it is function-scoped or globally-scoped, depending on where it is declared.Syntaxvar variable = value;It declares a variable using var, assigns it 7 min read JS OperatorsJavaScript OperatorsJavaScript operators are symbols or keywords used to perform operations on values and variables. They are the building blocks of JavaScript expressions and can manipulate data in various ways.There are various operators supported by JavaScript:1. JavaScript Arithmetic OperatorsArithmetic Operators p 5 min read Operator precedence in JavaScriptOperator precedence refers to the priority given to operators while parsing a statement that has more than one operator performing operations in it. Operators with higher priorities are resolved first. But as one goes down the list, the priority decreases and hence their resolution. ( * ) and ( / ) 2 min read JavaScript Arithmetic OperatorsJavaScript Arithmetic Operators are the operator that operate upon the numerical values and return a numerical value. Addition (+) OperatorThe addition operator takes two numerical operands and gives their numerical sum. It also concatenates two strings or numbers.JavaScript// Number + Number => 5 min read JavaScript Assignment OperatorsAssignment operators are used to assign values to variables in JavaScript.JavaScript// Lets take some variables x = 10 y = 20 x = y ; console.log(x); console.log(y); Output20 20 More Assignment OperatorsThere are so many assignment operators as shown in the table with the description.OPERATOR NAMESH 5 min read JavaScript Comparison OperatorsJavaScript comparison operators are essential tools for checking conditions and making decisions in your code. 1. Equality Operator (==) The Equality operator is used to compare the equality of two operands. JavaScript// Illustration of (==) operator let x = 5; let y = '5'; // Checking of operands c 5 min read JavaScript Logical OperatorsLogical operators in JavaScript are used to perform logical operations on values and return either true or false. These operators are commonly used in decision-making statements like if or while loops to control the flow of execution based on conditions.In JavaScript, there are basically three types 5 min read JavaScript Bitwise OperatorsIn JavaScript, a number is stored as a 64-bit floating-point number but bitwise operations are performed on a 32-bit binary number. To perform a bit-operation, JavaScript converts the number into a 32-bit binary number (signed) and performs the operation and converts back the result to a 64-bit numb 5 min read JavaScript Ternary OperatorThe Ternary Operator in JavaScript is a conditional operator that evaluates a condition and returns one of two values based on whether the condition is true or false. It simplifies decision-making in code, making it more concise and readable. Syntaxcondition ? trueExpression : falseExpressionConditi 4 min read JavaScript Comma OperatorJavaScript Comma Operator mainly evaluates its operands from left to right sequentially and returns the value of the rightmost operand. JavaScriptlet x = (1, 2, 3); console.log(x); Output3 Here is another example to show that all expressions are actually executed.JavaScriptlet a = 1, b = 2, c = 3; l 2 min read JavaScript Unary OperatorsJavaScript Unary Operators work on a single operand and perform various operations, like incrementing/decrementing, evaluating data type, negation of a value, etc.Unary Plus (+) OperatorThe unary plus (+) converts an operand into a number, if possible. It is commonly used to ensure numerical operati 4 min read JavaScript in and instanceof operatorsJavaScript Relational Operators are used to compare their operands and determine the relationship between them. They return a Boolean value (true or false) based on the comparison result.JavaScript in OperatorThe in-operator in JavaScript checks if a specified property exists in an object or if an e 3 min read JavaScript String OperatorsJavaScript String Operators are used to manipulate and perform operations on strings. There are two operators which are used to modify strings in JavaScript. These operators help us to join one string to another string.1. Concatenate OperatorConcatenate Operator in JavaScript combines strings using 3 min read JS StatementsJavaScript StatementsJavaScript statements are programming instructions that a computer executes. A computer program is essentially a list of these "instructions" designed to perform tasks. In a programming language, such instructions are called statements.Types of Statements1. Variable Declarations (var, let, const)In 4 min read JavaScript if-elseJavaScript conditional statements allow programs to make decisions based on specific conditions. They control the flow of execution, enabling different actions for different scenarios.JavaScript if-statementIt is a conditional statement that determines whether a specific action or block of code will 3 min read JavaScript switch StatementThe switch statement evaluates an expression and executes code based on matching cases. It’s an efficient alternative to multiple if-else statements, improving readability when handling many conditions.Syntaxswitch (expression) { case value1: // Code block 1 break; case value2: // Code block 2 break 4 min read JavaScript Break StatementJavaScript break statement is used to terminate the execution of the loop or the switch statement when the condition is true.In Switch Block (To come out of the block)JavaScriptconst fruit = "Mango"; switch (fruit) { case "Apple": console.log("Apple is healthy."); break; case "Mango": console.log("M 2 min read JavaScript Continue StatementThe continue statement in JavaScript is used to break the iteration of the loop and follow with the next iteration. Example of continue to print only odd Numbers smaller than 10JavaScriptfor (let i = 0; i < 10; i++) { if (i % 2 == 0) continue; console.log(i); }Output1 3 5 7 9 How Does Continue Wo 1 min read JavaScript Return StatementThe return statement in JavaScript is used to end the execution of a function and return a value to the caller. It is used to control function behaviour and optimise code execution.Syntaxreturn [expression]Expression Evaluation: The expression inside the brackets is evaluated and returned to the cal 4 min read JS LoopsJavaScript LoopsLoops in JavaScript are used to reduce repetitive tasks by repeatedly executing a block of code as long as a specified condition is true. This makes code more concise and efficient.Suppose we want to print 'Hello World' five times. Instead of manually writing the print statement repeatedly, we can u 3 min read JavaScript For LoopJavaScript for loop is a control flow statement that allows code to be executed repeatedly based on a condition. It consists of three parts: initialization, condition, and increment/decrement. Syntaxfor (statement 1 ; statement 2 ; statement 3){ code here...}Statement 1: It is the initialization of 4 min read JavaScript While LoopThe while loop executes a block of code as long as a specified condition is true. In JavaScript, this loop evaluates the condition before each iteration and continues running as long as the condition remains true.Syntaxwhile (condition) { Code block to be executed}Here's an example that prints from 3 min read JavaScript For In LoopThe JavaScript for...in loop iterates over the properties of an object. It allows you to access each key or property name of an object.JavaScriptconst car = { make: "Toyota", model: "Corolla", year: 2020 }; for (let key in car) { console.log(`${key}: ${car[key]}`); }Outputmake: Toyota model: Corolla 3 min read JavaScript for...of LoopThe JavaScript for...of loop is a modern, iteration statement introduced in ECMAScript 2015 (ES6). Works for iterable objects such as arrays, strings, maps, sets, and more. It is better choice for traversing items of iterables compared to traditional for and for in loops, especially when we have bre 3 min read JavaScript do...while LoopA do...while loop in JavaScript is a control structure where the code executes repeatedly based on a given boolean condition. It's similar to a repeating if statement. One key difference is that a do...while loop guarantees that the code block will execute at least once, regardless of whether the co 4 min read JS Perfomance & DebuggingJavaScript | PerformanceJavaScript is a fundamental part of nearly every web application and web-based software. JavaScript’s client-side scripting capabilities can make applications more dynamic and interactive, but it also increases the chance of inefficiencies in code. Poorly written JavaScript can degrade user experien 4 min read Debugging in JavaScriptDebugging is the process of testing, finding, and reducing bugs (errors) in computer programs. It involves:Identifying errors (syntax, runtime, or logical errors).Using debugging tools to analyze code execution.Implementing fixes and verifying correctness.Types of Errors in JavaScriptSyntax Errors: 4 min read JavaScript Errors Throw and Try to CatchJavaScript uses throw to create custom errors and try...catch to handle them, preventing the program from crashing. The finally block ensures that code runs after error handling, regardless of success or failure.throw: Creates custom errors and stops code execution.try...catch: Catches and handles e 2 min read JS ObjectObjects in JavascriptAn object in JavaScript is a data structure used to store related data collections. It stores data as key-value pairs, where each key is a unique identifier for the associated value. Objects are dynamic, which means the properties can be added, modified, or deleted at runtime.There are two primary w 4 min read Object Oriented Programming in JavaScriptObject Oriented Programming (OOP) is a style of programming that uses classes and objects to model real-world things like data and behavior. A class is a blueprint that defines the properties and methods an object can have, while an object is a specific instance created from that class. Why OOP is N 3 min read JavaScript ObjectsIn our previous article on Introduction to Object Oriented Programming in JavaScript we have seen all the common OOP terminology and got to know how they do or don't exist in JavaScript. In this article, objects are discussed in detail.Creating Objects:In JavaScript, Objects can be created using two 6 min read Creating objects in JavaScriptAn object in JavaScript is a collection of key-value pairs, where keys are strings (properties) and values can be any data type. Objects can be created using object literals, constructors, or classes. Properties are defined with key-value pairs, and methods are functions defined within the object, e 5 min read JavaScript JSON ObjectsJSON (JavaScript Object Notation) is a handy way to share data. It's easy for both people and computers to understand. In JavaScript, JSON helps organize data into simple objects. Let's explore how JSON works and why it's so useful for exchanging information.const jsonData = { "key1" : "value1", ... 3 min read JavaScript Object ReferenceJavaScript Objects are the most important data type and form the building blocks for modern JavaScript. The "Object" class represents the JavaScript data types. Objects are quite different from JavaScript’s primitive data types (Number, String, Boolean, null, undefined, and symbol). It is used to st 4 min read JS FunctionFunctions in JavaScriptFunctions in JavaScript are reusable blocks of code designed to perform specific tasks. They allow you to organize, reuse, and modularize code. It can take inputs, perform actions, and return outputs.JavaScriptfunction sum(x, y) { return x + y; } console.log(sum(6, 9)); // output: 15Function Syntax 4 min read How to write a function in JavaScript ?JavaScript functions serve as reusable blocks of code that can be called from anywhere within your application. They eliminate the need to repeat the same code, promoting code reusability and modularity. By breaking down a large program into smaller, manageable functions, programmers can enhance cod 4 min read JavaScript Function CallThe call() method is a predefined JavaScript method. It can be used to invoke (call) a method with an owner object as an argument (parameter). This allows borrowing methods from other objects, executing them within a different context, overriding the default value, and passing arguments. Syntax: cal 2 min read Different ways of writing functions in JavaScriptA JavaScript function is a block of code designed to perform a specific task. Functions are only executed when they are called (or "invoked"). JavaScript provides different ways to define functions, each with its own syntax and use case.Below are the ways of writing functions in JavaScript:Table of 3 min read Difference between Methods and Functions in JavaScriptGrasping the difference between methods and functions in JavaScript is essential for developers at all levels. While both are fundamental to writing effective code, they serve different purposes and are used in various contexts. This article breaks down the key distinctions between methods and funct 3 min read Explain the Different Function States in JavaScriptIn JavaScript, we can create functions in many different ways according to the need for the specific operation. For example, sometimes we need asynchronous functions or synchronous functions.  In this article, we will discuss the difference between the function Person( ) { }, let person = Person ( ) 3 min read JavaScript Function Complete ReferenceA JavaScript function is a set of statements that takes inputs, performs specific computations, and produces outputs. Essentially, a function performs tasks or computations and then returns the result to the user.Syntax:function functionName(Parameter1, Parameter2, ..) { // Function body}Example: Be 3 min read JS ArrayJavaScript ArraysIn JavaScript, an array is an ordered list of values. Each value, known as an element, is assigned a numeric position in the array called its index. The indexing starts at 0, so the first element is at position 0, the second at position 1, and so on. Arrays can hold any type of data—such as numbers, 7 min read JavaScript Array MethodsTo help you perform common tasks efficiently, JavaScript provides a wide variety of array methods. These methods allow you to add, remove, find, and transform array elements with ease.Javascript Arrays Methods1. JavaScript Array length The length property of an array returns the number of elements i 7 min read Best-Known JavaScript Array MethodsAn array is a special variable in all programming languages used to store multiple elements. JavaScript array come with built-in methods that every developer should know how to use. These methods help in adding, removing, iterating, or manipulating data as per requirements.There are some Basic JavaS 6 min read Important Array Methods of JavaScriptJavaScript arrays are powerful tools for managing collections of data. They come with a wide range of built-in methods that allow developers to manipulate, transform, and interact with array elements.Some of the most important array methods in JavaScript areTable of Content1. JavaScript push() Metho 7 min read JavaScript Array ReferenceJavaScript Array is used to store multiple elements in a single variable. It can hold various data types, including numbers, strings, objects, and even other arrays. It is often used when we want to store a list of elements and access them by a single variable.Syntax:const arr = ["Item1", "Item2", " 4 min read Like