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Was making a prompt using 5 product numbers and when i dont use one of the five my finial calculation for that one i didnt use turns into undefined value what do i do to change it to Number 0.
<?xml version = “1.0” encoding = “utf-8”?>
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN”
“
<html>
<head>
<style <“text/css”>
th { text-align:left;}
table { width:100% }
</style>
<script type = “text/javascript”>
<!–
var quantity;
var choice;
var total1;
var total2;
var total3;
var total4;
var total5;
var productnumber;
while ( choice != 0)
{
choice = window.prompt( “Enter product number [1-5] [0 to stop]:” , “” );
switch ( choice )
{
case “1”:
quantity = parseInt(window.prompt( “Enter quantity sold:”, “” ));
productnumber = 2.98;
total1 = quantity * productnumber;
break;
case “2”:
quantity = parseInt(window.prompt( “Enter quantity sold:”, “” ));
productnumber = 4.50;
total2 = quantity * productnumber;
break;
case “3”:
quantity = parseInt(window.prompt( “Enter quantity sold:”, “” ));
productnumber = 9.98;
total3 = quantity * productnumber;
break;
case “4”:
quantity = parseInt(window.prompt( “Enter quantity sold:”, “” ));
productnumber = 4.49;
total4 = quantity * productnumber;
break;
case “5”:
quantity = parseInt(window.prompt( “Enter quantity sold:”, “” ));
productnumber = 6.87;
total5 = quantity * productnumber;
break;
}
if ( choice > 5 )
window.alert(“Enter product number 1-5 or 0 to stop”, “” );
}
document.writeln( “<h2>Product Totals</h2>” );
document.writeln( “<table border = “1”>”);
document.writeln( “<thead><tr><th>Product#</th>” );
document.writeln( “<th>Total Sales</th>” );
document.writeln( “</tr><thead><tbody> ” );
document.writeln( “<tr><td>Product1</td><td>” + total1 + “</td></tr>” );
document.writeln( “<tr><td>Product2</td><td>” + total2 + “</td></tr>” );
document.writeln( “<tr><td>Product3</td><td>” + total3 + “</td></tr>” );
document.writeln( “<tr><td>Product4</td><td>” + total4 + “</td></tr>” );
document.writeln( “<tr><td>Product5</td><td>” + total5 + “</td></tr>” );
document.writeln( “</tbody></table>” );
// –>
</script>
</head>
<body>
</body>
</html>