源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>JavaScript Math</h1> <p>Math.floor(Math.random() * 10) 返回0和9之间的随机整数（包括两个）.</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = Math.floor(Math.random() * 10); </script> </body> </html>
运行结果