我自己尝试了这个，但它显示错误，这段代码有什么问题？ [英] I tried this by own but it is showing error, what is the problem with this code?
问题描述
<！doctype html>
< title>循环！
var w = 3;
var x = 4;
var y = 5;
var z = 6;
函数add（w，x，y，z）{return var total =（w + x + y + z）;}
提醒（加）;
我的尝试：
当我练习时我正在学习Javascript我遇到了这种情况。
你甚至没有调用javascript来查看你的代码或数据。
你真的需要一个非常基础的教程来帮助你走上任何一条道路。
尝试：这个 [ ^ ]，对我有用。
从提交的外观来看，你真的应该通过HTML教程（做那个）首先）。
更正，检查内联评论
<！DOCTYPE html>
< html xmlns =http://www.w3.org/1999/xhtml>
< head>
< script>
var a = 3;
var b = 4;
var c = 5;
var d = 6;
函数add（w，x，y，z）{
var total =（w + x + y + z）;
总回报; //返回变量，而不是变量声明
}
alert（add（a，b，c，d））; //传递参数
< / script>
< / head>
< body>
< / body>
< / html>
我已重命名变量以便更好地理解。有关Javascript范围的更多信息，请参阅此 JavaScript范围 [ ^ ]
JavaScript函数调用 [ ^
<!doctype html>
<title>Loops!
var w = 3;
var x = 4;
var y = 5;
var z = 6;
function add(w,x,y,z){ return var total=(w+x+y+z);}
alert(add);
What I have tried:
I am learning Javascript when I was practicing I stuck in this situation.
Your not even "invoking" javascript to look at your code or data.
You really need a very basic tutorial to get you on any kind of path.
Try: This[^], which worked for me.
From the looks of your submission, you really should go through the HTML tutorial, as well (do that first).
correction, check the inline comments
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <script> var a = 3; var b = 4; var c = 5; var d = 6; function add(w, x, y, z) { var total = (w + x + y + z); return total; // return the variable, instead of variable declaration } alert(add(a,b,c,d)); // pass the parameters </script> </head> <body> </body> </html>
I have renamed the variables for better understanding. for more information on Javascript scopes refer this JavaScript Scope[^]
JavaScript Function Invocation[^]
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