Welcome to the basic JavaScript tutorial! Below, you will find an introduction to JavaScript, a powerful language for web development. If you are looking for more advanced topics, you can check out our JavaScript Advanced Tutorial.

JavaScript 简介

JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript specification. It is a scripting language that is best known for being the core scripting language of JavaScript, but is also used in other programming environments.

JavaScript 的特点

  • 动态性: JavaScript 允许您在运行时动态地添加或修改功能。
  • 跨平台: JavaScript 可以在多种浏览器和操作系统上运行。
  • 事件驱动: JavaScript 使用事件驱动模型，这意味着您可以编写代码来响应用户的交互。

基础语法

Here are some basic syntax elements of JavaScript:

  • 变量声明: var variableName = value;
  • 函数定义: function functionName() { ... }
  • 条件语句: if (condition) { ... }
  • 循环语句: for (initialization; condition; increment) { ... } 或 while (condition) { ... }

实例

Here's a simple example of a JavaScript function that adds two numbers:

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

console.log(addNumbers(5, 3)); // Outputs: 8

图片示例

Here is an image of a JavaScript logo to illustrate the topic:

JavaScript Logo

By understanding the basics of JavaScript, you'll be well on your way to creating dynamic and interactive web pages.