源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>JavaScript 操作符</h1> <p>JavaScript 使用算术运算符计算值（就像数学）.</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = (5 + 6) * 10; </script> </body> </html>
运行结果