JavaScript Code Samples

Below are some popular JavaScript code samples that you can use to learn and practice your JavaScript skills.

1. Hello World

The classic "Hello World" example is a great way to start learning any programming language, including JavaScript.

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

2. Calculator

A simple calculator can help you understand basic arithmetic operations in JavaScript.

function add(a, b) {
  return a + b;
}

function subtract(a, b) {
  return a - b;
}

function multiply(a, b) {
  return a * b;
}

function divide(a, b) {
  if (b !== 0) {
    return a / b;
  } else {
    return "Error: Division by zero";
  }
}

3. DOM Manipulation

Manipulating the Document Object Model (DOM) is a fundamental skill in JavaScript.

function changeText() {
  document.getElementById("myText").innerHTML = "Text changed!";
}

document.getElementById("myButton").addEventListener("click", changeText);

4. Fetch API

The Fetch API is a modern way to make HTTP requests in JavaScript.

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

For more examples and tutorials, check out our JavaScript documentation.