update

2024-07-05 06:29:05 +08:00 · 2024-07-05 06:29:05 +08:00 · 797149d7db
commit 797149d7db
parent de38186cef
3 changed files with 83 additions and 0 deletions
--- a/2024.07.05_javascript_example/JS_example.html
+++ b/2024.07.05_javascript_example/JS_example.html
@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>JavaScript Example</title>
+</head>
+<body>
+    <h2>Hello, World!</h2>
+    <div id="content"></div>
+    <script>
+        var username = "Guan";
+        let year = 1993;
+        const country = "China";
+        document.getElementById('content').innerHTML = username + "<br>" + year + "<br>" + country;
+    </script>
+</body>
+</html>
--- a/2024.07.05_javascript_example/javascript_example.js
+++ b/2024.07.05_javascript_example/javascript_example.js
@ -0,0 +1,61 @@
+// 输出到控制台
+console.log("Hello, World!"); 
+
+
+// 变量声明
+var name = "Alice";  // 不推荐，因为它有作用域问题
+let age = 25;  // 推荐
+const pi = 3.14159; // 用于常量
+
+
+// 数据类型
+let number = 42; // 数字
+let text = "Hello"; // 字符串
+let isTrue = true; // 布尔值
+let items = [1, 2, 3]; // 数组
+let person = { name: "John", age: 30 }; // 对象
+
+
+// 基本运算
+let sum = 10 + 5; // 加法
+let difference = 10 - 5; // 减法
+let product = 10 * 5; // 乘法
+let quotient = 10 / 5; // 除法
+let a = 0.1;
+let b = 0.2;
+let c = a + b; // 浮点加法
+
+
+// 条件语句
+let abc = 10;
+if (abc > 0) {
+    console.log("abc is positive.");
+} else if (abc < 0) {
+    console.log("abc is negative.");
+} else {
+    console.log("abc is zero.");
+}
+console.log('');
+
+
+// for 循环
+for (let i = 0; i < 5; i++) {
+    console.log(i);
+}
+console.log('')
+
+
+// while 循环
+let i = 0;
+while (i < 5) {
+console.log(i);
+i++;
+}
+console.log('');
+
+
+// 函数定义和调用
+function greet(name) {
+    return "Hello, " + name;
+}
+console.log(greet("Guan"));
--- a/2024.07.05_javascript_example/test.js
+++ b/2024.07.05_javascript_example/test.js
@ -0,0 +1,4 @@
+var username = "Guan";
+let year = 1993;
+const country = "China"
+console.log(username + "\n" + year + "\n" + country);