How to divide sum by 2 if checkbox checked? javascript/html

Question

Like written in the Title. I am trying to get the sum from some fields - this is working fine already. But I want to add a function that if the check box is checked before and I press the "Calculate" Button the sum should be divided / 2 automatically. I don't have the code I already have in the moment but if its needed I will upload later. But for now maybe its some easy thing and very general. Maybe someone can give some example already. kind regards

Answer 1

$('#calculateButton').on('click', function(){
  // do summation and assign it to sum variable
  var sum = sumCalculation();
  if ($('#checkbox').is(':checked'))
  {
    sum = sum/2;
  }
});

Answer 2

Since you did not provide any markup, you should do something like this, but adapted to your code:

var sum = calculateSum();

if ($("#checkbox").is(':checked')) sum = sum/2;

Answer 3

You may try:

$("#checkbox").change(function(){
  if($(this).is(':checked')){
    // do the division
  }
});

Assuming your checkbox would have id="checkbox"

Answer 4

var chksum = document.getElementById('u r checkbox ID').checked;

if(chksum=="true")
{
sum=sum/2;
}

Answer 5

Try this. Note let the id of checkbox is #checkbox

var sum = 10;
$("#checkbox").change(function(){
    if($(this).is(':checked')){
        sum /=2;
    }
    alert(sum);
});