Get total sum from input box values using Javascript, with decimals

Question

I copied this from another answer, and it works, but I need to get the two numbers behind the decimal. This rounds...

Qty1 : <input onblur="findTotal()" type="text" name="qty" id="qty2"/><br>
Qty2 : <input onblur="findTotal()" type="text" name="qty" id="qty2"/><br>
Qty3 : <input onblur="findTotal()" type="text" name="qty" id="qty3"/><br>
Qty4 : <input onblur="findTotal()" type="text" name="qty" id="qty4"/><br>
Qty5 : <input onblur="findTotal()" type="text" name="qty" id="qty5"/><br>
Qty6 : <input onblur="findTotal()" type="text" name="qty" id="qty6"/><br>
Qty7 : <input onblur="findTotal()" type="text" name="qty" id="qty7"/><br>
Qty8 : <input onblur="findTotal()" type="text" name="qty" id="qty8"/><br>

Total : <input type="text" name="total" id="total"/>

<script type="text/javascript">
function findTotal(){
var arr = document.getElementsByName('qty');
var tot=0;
for(var i=0;i<arr.length;i++){
    if(parseInt(arr[i].value))
        tot += parseInt(arr[i].value);
}
document.getElementById('total').value = tot;
}

</script>

try parseFloat developer.mozilla.org/en/docs/Web/JavaScript/Reference/… instead of parseInt — Mi-Creativity
– Mi-Creativity, Commented Jan 15, 2016 at 7:20

Saqib Amin · Accepted Answer · 2016-01-15 07:34:32Z

2

Replace you script with following:

<script type="text/javascript">
function findTotal(){
var arr = document.getElementsByName('qty');
var tot=0;
for(var i=0;i<arr.length;i++){
    if(parseFloat(arr[i].value))
        tot += parseFloat(arr[i].value).toFixed(2);
}
document.getElementById('total').value = tot;
}

</script>

edited Jan 15, 2016 at 7:34

answered Jan 15, 2016 at 7:22

Saqib Amin

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Comments

ozil · Accepted Answer · 2016-01-15 07:22:06Z

1

Qty1 : <input onblur="findTotal()" type="text" name="qty" id="qty2"/><br>
Qty2 : <input onblur="findTotal()" type="text" name="qty" id="qty2"/><br>
Qty3 : <input onblur="findTotal()" type="text" name="qty" id="qty3"/><br>
Qty4 : <input onblur="findTotal()" type="text" name="qty" id="qty4"/><br>
Qty5 : <input onblur="findTotal()" type="text" name="qty" id="qty5"/><br>
Qty6 : <input onblur="findTotal()" type="text" name="qty" id="qty6"/><br>
Qty7 : <input onblur="findTotal()" type="text" name="qty" id="qty7"/><br>
Qty8 : <input onblur="findTotal()" type="text" name="qty" id="qty8"/><br>

Total : <input type="text" name="total" id="total"/>

<script type="text/javascript">
function findTotal(){
var arr = document.getElementsByName('qty');
var tot=0;
for(var i=0;i<arr.length;i++){
    if(parseFloat(arr[i].value))       // parseFloat() instead of parseInt()
        tot += parseFloat(arr[i].value);    // parseFloat() instead of parseInt()
}
document.getElementById('total').value = tot;
}

</script>

answered Jan 15, 2016 at 7:22

ozil

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4 Comments

Mi-Creativity Over a year ago

I think you need to change it in both places

Josiah Over a year ago

Thank you! What if I only what 2 places behind the decimal?

Mi-Creativity Over a year ago

use toFixed()

ozil Over a year ago

toFixed is used for rounding the number

Mi-Creativity · Accepted Answer · 2016-01-15 07:43:13Z

1

function findTotal(){
var arr = document.getElementsByName('qty');
var tot=0;
for(var i=0;i<arr.length;i++){
if(parseFloat(arr[i].value))       // parseFloat() instead of parseInt()
    tot += parseFloat(arr[i].value);    // parseFloat() instead of parseInt()
}
document.getElementById('total').value = tot.toFixed(2);
}

edited Jan 15, 2016 at 7:43

Mi-Creativity

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answered Jan 15, 2016 at 7:36

Josiah

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Comments

frogatto · Accepted Answer · 2016-01-15 08:02:56Z

0

Instead of parseInt use parseFloat. And then use toFixed() for displaying only 2 decimals.

answered Jan 15, 2016 at 8:02

frogatto

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