JavaScript-Course-2025

What Are Arithmetic Operators in JavaScript? Arithmetic operators in JavaScript let you perform mathematical operations on numbers. These operators are fundamental in coding, enabling tasks like calculations, loops and dynamic logic. Whether you’re building a calculator or performing complex data manipulation, these operators are your go-to tools. Common JavaScript Arithmetic Operators Here are the primary … Read more

JavaScript operators are symbols or keywords used to perform operations on values or variables. They help manipulate data, compare values and control the logic of your code. Operators are a core part of JavaScript, enabling developers to build functional and dynamic applications. Types of JavaScript Operators JavaScript provides several types of operators, including: 1. Arithmetic … Read more

The const keyword in JavaScript, introduced in ES6 (ECMAScript 2015), is used to declare constants. A constant is a variable whose value cannot be reassigned once it is initialized. This makes const an excellent choice for values that should remain constant throughout the program. It ensures better code reliability and readability by preventing accidental changes. … Read more

The let keyword in JavaScript was introduced in ES6 (ECMAScript 2015) to provide a more flexible and predictable way of declaring variables. Unlike var, the let keyword offers block-level scope, making it a preferred choice for modern JavaScript programming. It prevents many issues associated with var and is a standard for variable declaration today. Key … Read more

In JavaScript, variables are containers that store data values. They allow you to reuse and manipulate data throughout your code. A variable essentially acts as a named placeholder for values in your program. For example, if you need to store a user’s age, you can declare a variable to hold that value. Why Are Variables … Read more

JavaScript comments are lines of code that the browser ignores during execution. They are used to explain code, make it more readable and debug effectively. Comments are essential for maintaining code clarity, especially in complex programs. Why Use Comments in JavaScript? Types of Comments in JavaScript 1. Single-Line Comments Single-line comments start with // and … Read more

JavaScript syntax is the set of rules that define how JavaScript programs are written and understood by the browser. Just like grammar in a language, syntax ensures the code is structured and functional. Key Components of JavaScript Syntax 1. Statements Example: let name = “John”; // Statement that declares a variableconsole.log(name); // Statement that prints … Read more

JavaScript statements are the building blocks of JavaScript code. They are instructions that tell the browser what to do. Each statement performs a specific action, such as assigning a value, performing a calculation or executing a function. JavaScript code is executed line by line and statements must follow proper syntax to avoid errors. Basic Structure … Read more

JavaScript provides several ways to display data and interact with users. Whether you’re debugging, updating the webpage or sending information to users, understanding these output methods is crucial. Each method serves a specific purpose and choosing the right one depends on your use case. In this lesson, you will explore the four primary ways to … Read more

JavaScript can be placed in different locations within an HTML file and each method serves specific purposes. Understanding where to place JavaScript code ensures better performance, maintainability and a seamless user experience. The three primary ways to include JavaScript in your HTML document: inline, internal and external. Additionally. Methods to Include JavaScript in HTML Let’s … Read more