JavaScript Syntax

JavaScript is a powerful programming language used to create interactive web pages. Whether you’re building forms, animations, or games, JavaScript syntax plays a crucial role in making things work. Let's quickly look at the basic syntax to get started.

1. Variables & Constants

In JavaScript, we use let and const to declare variables and constants. let is used for variables that can change, and const is used for values that should remain constant.

            
                let name = 'Alice'; // Variable
                const age = 25;     // Constant
            
        

2. Data Types

JavaScript has different data types such as String, Number, Boolean, Object, and Array to store and manipulate data.

            
                let name = 'Alice';   // String
                let age = 25;         // Number
                let isStudent = true; // Boolean
                let person = { name: 'Alice', age: 25 }; // Object
            
        

3. Functions

Functions are reusable blocks of code that perform specific tasks. You can define them using the function keyword or use the modern arrow function syntax.

            
                // Function Declaration
                function greet(name) {
                    console.log('Hello, ' + name);
                }

                // Arrow Function
                const greet = (name) => console.log('Hello, ' + name);
            
        

4. Control Structures

JavaScript uses if, else, and switch statements to make decisions based on conditions. It also uses loops like for and while to repeat code.

            
                if (age >= 18) {
                    console.log('Adult');
                } else {
                    console.log('Minor');
                }

                // Loop Example
                for (let i = 0; i < 5; i++) {
                    console.log(i);  // Output: 0, 1, 2, 3, 4
                }
            
        

This was a quick overview of some basic JavaScript syntax. JavaScript is a flexible and powerful language that you can use to add interactivity and dynamic content to your web pages. By understanding these fundamental concepts, you're on your way to building more engaging and functional websites!