Javascript averaging problem [Done]

Josh
Part of the Furniture

Apple iManiac / eBay Addict

Posts: 12,347

Javascript averaging problem [Done] Mar 10, 2010 16:34:13 GMT -8

Post by Josh on Mar 10, 2010 16:34:13 GMT -8

I am having problems with my code with getting the 10 numbers that the user prompts to average and display correctly. Does anyone have any idea what I am doing wrong?

Here is what I have so far:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Lab 5.4</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <script type="text/javascript">

var linebreak = "<br />";
document.write("Grades inputed below:");
document.write(linebreak);

for(i = 0; i < 10; i++){
    grade = prompt("Please enter a grade", "");
	document.write("Grade " + (i + 1) + ": " + grade);
	document.write(linebreak);
	
	Total = grade++;
}

document.write("Average Grade: " + (Total/10));

</script>

    </div>
    </form>
</body>
</html>

Thanks so much!

Last Edit: Mar 10, 2010 21:36:35 GMT -8 by Josh

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Bob
v6 Beta Tester

Posts: 2,623

Javascript averaging problem [Done] Mar 10, 2010 17:27:13 GMT -8

Post by Bob on Mar 10, 2010 17:27:13 GMT -8

Mar 10, 2010 16:34:13 GMT -8 Josh said:

I am having problems with my code with getting the 10 numbers that the user prompts to average and display correctly. Does anyone have any idea what I am doing wrong?

Here is what I have so far:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Lab 5.4</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <script type="text/javascript">

var linebreak = "<br />";
document.write("Grades inputed below:");
document.write(linebreak);

for(i = 0; i < 10; i++){
    grade = prompt("Please enter a grade", "");
	document.write("Grade " + (i + 1) + ": " + grade);
	document.write(linebreak);
	
	Total = grade++;
}

document.write("Average Grade: " + (Total/10));

</script>

    </div>
    </form>
</body>
</html>

Thanks so much!

The prompt is returning a string. Pass the grade variable through parseInt () and you'll have what you're looking for. Well, almost.

Total = grade++;

You don't want to be redefining the total every single loop, you want a running tally. And grade++ is incrementing the grade variable, something you shouldn't be doing here either.

<script type="text/javascript">

var linebreak = "<br />";

document.write("Grades inputed below:");
document.write(linebreak);

var total = 0;

for (var i = 0; i < 10; i++)
{
  grade = prompt ("Please enter a grade", "");
  document.write ("Grade " + (i + 1) + ": " + grade + linebreak);
    
  total += parseInt(grade);
}

document.write("Average Grade: " + (total / 10));

</script>

The += operator says "Add RHS to the current value of LHS." And parseInt has a couple uses (read up on it here) but what it's doing here is converting a string to an integer.

Josh Part of the Furniture Apple iManiac / eBay Addict Posts: 12,347 Josh inherit Male 27278 0 Aug 3, 2024 9:13:18 GMT -8 Josh Apple iManiac / eBay Addict 12,347 Part of the Furniture July 2004 jwd41190	Javascript averaging problem [Done] Mar 10, 2010 18:25:19 GMT -8 Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Josh on Mar 10, 2010 18:25:19 GMT -8 Ok,thanks I got it working now
	4 8 15 16 23 42

Javascript averaging problem [Done]

Post by Josh on Mar 10, 2010 16:34:13 GMT -8

Post by Bob on Mar 10, 2010 17:27:13 GMT -8

Post by Josh on Mar 10, 2010 18:25:19 GMT -8