点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript 变量</h1> <p>相加 3 + 5 + "8" 的结果是：</p> <p id="demo"></p> <script> var x = 3 + 5 + "8" document.getElementById("demo").innerHTML = x; </script> </body> </html>
运行结果
