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<!DOCTYPE html> <html> <body> <h2>JavaScript 函数</h2> <p>这个例子调用了一个函数来执行计算并返回结果：</p> <p id="demo"></p> <script> var x = myFunction(4, 3); document.getElementById("demo").innerHTML = x; function myFunction(a, b) { return a * b; } </script> </body> </html>