I tried this by own but it is showing error, what is the problem with this code?

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<!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.

Posted 28-Nov-17 6:34am

Member 13546209

Updated 28-Nov-17 16:22pm

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W∴ Balboos, *GHB* · Answer 1 · 2017-11-28T06:46:00

Solution 1

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).

Posted 28-Nov-17 6:46am

W∴ Balboos, GHB

Updated 28-Nov-17 6:47am

v2

Karthik_Mahalingam · Answer 2 · 2017-11-28T16:22:00

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[^]