What is the correct method for calculating the sum of one input field and multiple output fields?

Question

What is the correct method for calculating the sum of one input field and multiple output fields?

I have a single input field and multiple calculated output fields using JavaScript :Click here to view the screenshot of the calculated problem

You can see the live preview on this link: . When you visit this link, enter "Base on your annual bill amount: $[input any value]" and observe that the output values are not calculated correctly. I am feeling frustrated and need assistance on how to generate proper output values. Here is an excerpt from my code:

function unit_val(){
var arr = document.getElementsByName('unit_val');
var unit_val_tot=0;
for(var i=0;i<arr.length;i++){
    if(parseInt(arr[i].value))
        unit_val_tot += parseInt(arr[i].value);
        unit_val_tots =unit_val_tot.toFixed(2);
}
document.getElementById('total_amount').value = unit_val_tots;
document.getElementById('total_amount2').value = unit_val_tots;
}

Alternatively, you can also check the source code of the view page.

javascript calculated-columns

Answer 1

Answer №1

Here is a helpful tip for you:

function calculateTotal(){
    var elements = document.getElementsByName('unit_val');
    var totalAmount = 0;
    for(var i=0;i<elements.length;i++){
        if(parseFloat(elements[i].value))
            totalAmount += parseFloat(elements[i].value);
            totalAmountFormatted = totalAmount.toFixed(2);
    }
    document.getElementById('total_amount').value = totalAmountFormatted;
    document.getElementById('total_amount2').value = totalAmountFormatted;
}

Answer 2

Here is a helpful tip for you:

function calculateTotal(){
    var elements = document.getElementsByName('unit_val');
    var totalAmount = 0;
    for(var i=0;i<elements.length;i++){
        if(parseFloat(elements[i].value))
            totalAmount += parseFloat(elements[i].value);
            totalAmountFormatted = totalAmount.toFixed(2);
    }
    document.getElementById('total_amount').value = totalAmountFormatted;
    document.getElementById('total_amount2').value = totalAmountFormatted;
}

Answer 3

Answer №2

After reviewing the data, it appears that the final sum is inaccurate due to a parsing error. The presence of decimals in your values is causing this discrepancy, as using parseInt converts them into whole numbers which may lead to slight discrepancies.

function calculateTotal(){
var elements = document.getElementsByName('unit_val');
var totalAmount = 0;
for(var i=0; i<elements.length; i++){
    if(parseInt(elements[i].value))
        totalAmount += elements[i].value;
        totalAmountFormatted = totalAmount.toFixed(2);
}
document.getElementById('final_total').value = totalAmountFormatted;
document.getElementById('final_total2').value = totalAmountFormatted;
}

Answer 4

After reviewing the data, it appears that the final sum is inaccurate due to a parsing error. The presence of decimals in your values is causing this discrepancy, as using parseInt converts them into whole numbers which may lead to slight discrepancies.

function calculateTotal(){
var elements = document.getElementsByName('unit_val');
var totalAmount = 0;
for(var i=0; i<elements.length; i++){
    if(parseInt(elements[i].value))
        totalAmount += elements[i].value;
        totalAmountFormatted = totalAmount.toFixed(2);
}
document.getElementById('final_total').value = totalAmountFormatted;
document.getElementById('final_total2').value = totalAmountFormatted;
}

What is the correct method for calculating the sum of one input field and multiple output fields?

Answer №1

Answer №2

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