Code to do different mathematical calculation in each row?

I have this page in pic :


I need to get [D] and [E] from another inputs and in each row I have a different mathematical (power of & divided by )
any one know code to get the result of each mathematical calculation ?
and How I get [D] and [E] from another function ???
this is the code of HTML:

<td>Daily aeroplane landings for all runways:<br>
Annual aeroplane landings all runways  ÷ 365 days per annum Daily aeroplane landings all runways
<div class="row gtr-uniform">
<div><input type="text" class="total" name="demo-r" id="number" value="" style="height: 2em" /></div>
<div  id="outpoput"></div><br/></div>
<br/>Average annual aeroplane mass for annual aeroplane landings for all runways:<br>
<span class="auto-style1">Annual aeroplane landing mass</span> ÷
<span class="auto-style1">Annual aeroplane landings</span>=
<span class="auto-style1">Average annual aeroplane mass for annual aeroplane landings for all runways </span></div>
<div class="row gtr-uniform">
<div><input type="text" name="demo-av" id="ber" value="" style="height: 2em; width: 60%" /></div>
<div><input type="text" name="demo-ev" id="rom" value="" style="height: 2em; width: 60%" /></div>
<div><input type="text" name="demo-nv" id="tot" value="" style="height: 2em" /></div>

please heeeeelp me

1 Like

please help me cuze I’m new in programming and I keep trying for 3 days but no result at all

I have this code :

<html>
  <table>
        <tr>
            <th>
                Quanity
            </th>
            <th>
                Unit Price
            </th>
            <th>
                Total
            </th>
        </tr>
        <tr class="txtMult">
            <td>
                <input name="txtEmmail" class="val1"  />
            </td>
            <td>
                <input name="txtEmmail" class="val2"/>
            </td>
            <td>
                    <span class="multTotal">0.00</span>
            </td>
        </tr>
        <tr class="txtMult">
            <td>
                <input name="txtEmmail" class="val1"  />
            </td>
            <td>
                <input name="txtEmmail" class="val2"/>
            </td>
            <td>
                    <span class="multTotal">0.00</span>
            </td>
        </tr>
        <tr class="txtMult">
            <td>
                <input name="txtEmmail" class="val1"  />
            </td>
            <td>
                <input name="txtEmmail" class="val2"/>
            </td>
            <td>
                    <span class="multTotal">0.00</span>
            </td>
        </tr>
        <tr class="txtMult">
            <td>
                <input name="txtEmmail" class="val1"  />
            </td>
            <td>
                <input name="txtEmmail" class="val2"/>
            </td>
            <td>
                    <span class="multTotal">0.00</span>
            </td>
        </tr>
        <tr class="txtMult">
            <td>
                <input name="txtEmmail" class="val1"  />
            </td>
            <td>
                <input name="txtEmmail" class="val2"/>
            </td>
            <td>
                    <span class="multTotal">0.00</span>
            </td>
        </tr>
            <tr>
    <td colspan="3" align="right">
        Grand Total# <span id="grandTotal">0.00</span><br>
        input Total# <span id="grandTotal1">0.00</span>
    </td>
</tr>
    </table> 
</html>
<script> 
$(document).ready(function () {
       $(".txtMult input").keyup(multInputs);
       function multInputs() {
           var mult = 0;
           var count = 0;
           var avg = 0;
           $("tr.txtMult").each(function () {
       for (var i = 0; i > 0; i++) 
          count++;
               var $val1 = $('.val1', this).val();
               var $val2 = $('.val2', this).val();
               var $total = ($val1 * 1) * ($val2 * 1)
               $('.multTotal',this).text($total);
               mult += $total;
               count +=$val2;
           });
           $("#grandTotal").text(mult);
           $("#grandTotal1").text(count);
       }
  });
</script>

If I input for example:1 &2 &3
The output of (grandTotal1) is 123 but I want the output is the sum =6
how can I do it?

You’re actually close. If you change exactly three lines, it fixes a couple problems you’re having.

First two lines to be changed are

var $val1 = $('.val1', this).val();
var $val2 = $('.val2', this).val();

Here, jQuery is returning the string value of each of these elements, which isn’t really what you want. You’re using a * 1 hack to force them to numbers, but it would be easier to do this when you’re getting the values themselves:

var $val1 = Number($('.val1', this).val());
var $val2 = Number($('.val2', this).val());

with that, $val1 and $val2 are coerced into numbers directly, with no hacks involved.

Doing that, the third line to be changed is the total:

var $total = ($val1 * 1) * ($val2 * 1);

simply becomes

var $total = $val1 * val2;

That said, you will really benefit from following through on @camperextraordinaire’s suggestion, that you take the time and work through the basic Javascript course. It will give you some fundamentals that, it seems, are questionable at the moment.

EDIT: To see the code working, with only the changes I’d mentioned, take a look at this repl.

thank u for this but I have another q
the result in<span id="grandTotal">0.00</span> only How I can change it to be in <input type="text"/>???

Give that input an id or something you can use as a selector, maybe grandTotalInput, then you could simply do:

$("#grandTotalInput").val(mult);

$(...).val() is an overloaded function - you can use it to both get the value of the form element, or if you specify a value, to set that form element’s value.

Also, I’ve updated the repl to reflect this and one other change – Currency should be rounded to two decimal places.

again, if my code doesn’t seem clear to you, work through the FCC Basics curriculum. It’s all there!

it doesn’t work <input type="text" id="grandTotalInput"/>0.00<br>

$("#grandTotalInput").value(mult);

I want the result to be in text input

yeah, should be val not value - I’m doing too many things at once.

could u help me in this code