Why do I keep getting NaN?

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These are my codes. I don't know why I keep getting NaN? Please help me on this one.

JS

JavaScript

function subtotal(){
            var as = $("#as").val();
            var txt1 = $('#sff').val();
            var txt2 = $('#osf').val();
            var d = 0;
            var e = 0;
            var f = 0;
            var g = 0;
            
            var a = parseFloat(as, 10);
            var b = parseFloat(txt1, 10);
            var c = parseFloat(txt2, 10);
            
            if ($('#cbx3').is(":checked")) {
                d = parseFloat($("#cbx3").val(), 10);
            }
            if ($('#cbx4').is(":checked")) {
                e = parseFloat($("#cbx4").val(), 10);
            }
            if ($('#cbx5').is(":checked")) {
                f = parseFloat($("#cbx5").val(), 10);
            }
            if ($('#cbx6').is(":checked")) {
                g = parseFloat($("#cbx6").val(), 10);
            }
            var total = a + b + c + d + e + f + g;
             
            $('#st').val(total.toFixed(2)); 
}
function grandtotal(){
    var x = document.getElementById("st").value;
    var y = document.getElementById("shppng").value;
    
    var sum = parseFloat(x, 10)+ parseFloat(y, 10);
    $("#gt").val(sum.toFixed(2));
}

HTML

<input type="text" id="sff" placeholder="$0.00" value="" style="float:left;"/>
<input type="text" id="osf" placeholder="$0.00" value="" style="float:left;"/>
<select id="as" style="margin: 3px 0 0 55px; width:48%; position: absolute; float: left;">
                                       
<option value="99.00">$99.00/</option>
                    
<option value="178.20">$178.20</option>
       
<option value="241.56">$241.56</option>
       
<option value="292.24">$292.24</option>
      
<option value="332.80">$332.80</option>
      
</select>
<input type="checkbox" id="cbx4" value="69.00"/>
               
<input type="checkbox" id="cbx5" value="35.00"/>
               
<input type="checkbox" id="cbx6" value="39.00"/>

Posted 8-Dec-14 21:50pm

missMarie

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Comments

/\jmot 9-Dec-14 3:53am

not clear?
specify..

Kornfeld Eliyahu Peter 9-Dec-14 3:57am

Because one of the values can not be converted to number using parseFloat...Go and debug your code to see on what line you have the problem...

2 solutions

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mudgilsks · Answer 1 · 2014-12-08T22:01:00

Solution 1

hi marrie,

also declare var a,b,c

before adding check
if (a=='' || a=='undefind'){
a=0
}

similarly other variable after that add them,it might sol your problem.

Posted 8-Dec-14 22:01pm

mudgilsks

jaket-cp · Answer 2 · 2014-12-08T23:19:00

The code does not show where subtotal or grandtotal are being called.

But the following advice should help you get you going on getting the code to work :)

NaN stands for not a number.

http://www.w3schools.com/jsref/jsref_parsefloat.asp[^]
Note: If the first character cannot be converted to a number, parseFloat returns NaN.

I am assuming the $ character is the first character being checked as that is the format specified to be used for the input, also an empty string is NaN.