源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>JavaScript 变量</h1> <p id="demo"></p> <script> var price1 = 5; var price2 = 6; var total = price1 + price2; document.getElementById("demo").innerHTML = "总计: " + total; </script> </body> </html>
运行结果