W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <body> <p id="demo"></p> <script> var x = 0.1; var y = 0.2; var z = (x * 10 + y *10) / 10; document.getElementById("demo").innerHTML = z; </script> </body> </html>