源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>var关键字创建一个变量</h1> <p id="demo"></p> <script> var x, y; x = 5 + 6; y = x * 10; document.getElementById("demo").innerHTML = y; </script> </body> </html>
运行结果