JavaScript statements are instructions that a browser executes. These instructions define the logic of your program, enabling you to interact with web pages dynamically.

Each statement can perform a specific task, like displaying a message, making calculations, or manipulating HTML elements.

What Are JavaScript Statements?

Definition: A JavaScript statement is a command written in the script to perform an action.

Example:

let x = 5; // Assigns value 5 to the variable x
console.log(x); // Displays the value of x in the console

Components of JavaScript Statements

1. Keywords
Reserved words in JavaScript that indicate specific actions.
Example: let, const, if, for.

2. Identifiers
Names are used to identify variables, functions, or objects.
Example:

let name = "Junaid"; // "name" is the identifier

3. Expressions
Pieces of code that produce values.
Example:

let total = 10 + 20; // "10 + 20" is an expression

4. Operators
Symbols are used to perform operations on variables or values.
Example: +, -, *, /.

Writing JavaScript Statements

Single-line Statement:
Executes one action in a single line.

console.log("Hello, World!");

Multi-line Statements:
Uses multiple lines for better readability.

let a = 10;
let b = 20;
console.log(a + b);

Semicolon Usage:
Semicolons (;) are optional but are recommended for separate statements.

Types of JavaScript Statements

1. Variable Declaration
Used to create variables to store data.
Example:

let age = 29; // Using let
const pi = 3.14; // Using const
var name = "Junaid"; // Using var

Assignment Statement
Assigns values to variables.
Example:

let x = 10;
let y = x + 5; // x + 5 is assigned to y

Best Practices for Writing JavaScript Statements

Use Descriptive Variable Names:
Example: Instead of x, use age or totalAmount.

JavaScript statements are the foundation of any program, enabling dynamic interactions on web pages.