点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript 函数</h1> <p>全局函数（myFunction）返回参数（a，b）的乘积：</p> <p id="demo"></p> <script> function myFunction(a, b) { return a * b; } document.getElementById("demo").innerHTML = myFunction(10, 2); </script> </body> </html>
运行结果
