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guanjihuan 2024-07-05 06:29:05 +08:00
parent de38186cef
commit 797149d7db
3 changed files with 83 additions and 0 deletions
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18
2024.07.05_javascript_example/JS_example.html Normal file
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<!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>

61
2024.07.05_javascript_example/javascript_example.js Normal file
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// 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"));

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2024.07.05_javascript_example/test.js Normal file
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var username = "Guan";
let year = 1993;
const country = "China"
console.log(username + "\n" + year + "\n" + country);