JavaScript Expressions

JavaScript is a powerful programming language that runs in the browser and helps build interactive websites. One of the core concepts in JavaScript is expressions. Expressions are the building blocks of any program, and understanding them is the first step toward writing JavaScript code.

JavaScript Expression

A JavaScript expression is a piece of code that produces a value. In simple words, whenever JavaScript evaluates something and gives back a result, it is called an expression. These values can be values, numbers, keywords, text (strings), or even complex objects.

Basic Syntax

The syntax of a JavaScript expression is quite flexible. It can be as simple as a single number or string, or it can be a combination of variables, operators, and functions.

 

// Basic Expression 
10 

// Expression using variables 
let x = 5; 
let y = 3; 

x + y // Result is 8

Basic Example

Let’s look at basic example to understand the concept.

let a = 20; 
let b = 10;

let result = a - b; // Expression that evaluates to 10 

console.log(result);

 

In this example, a - b is the expression. JavaScript evaluates it and produces the value 10.

Types of JavaScript Expressions

• https://www.testingdocs.com/types-of-javascript-expressions/

JavaScript Tutorials

JavaScript tutorials on this website can be found at:

• https://www.testingdocs.com/javascript-tutorial/