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<h3>JavaScript代码实例</h3>
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<th>功能描述</th>
<th>代码示例</th>
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<td>输出文本到控制台</td>
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<pre><code>console.log("Hello, World!");</code></pre>
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<td>定义变量并赋值</td>
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<pre><code>let x = 10;</code></pre>
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<td>条件判断语句</td>
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<pre><code>if (x > 5) {
console.log("x is greater than 5");
} else {
console.log("x is less than or equal to 5");
}</code></pre>
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<td>循环语句</td>
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<pre><code>for (let i = 0; i < 5; i++) {
console.log(i);
}</code></pre>
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<td>函数定义与调用</td>
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<pre><code>function greet(name) {
console.log("Hello, " + name + "!");
}
greet("Alice");</code></pre>
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