Question

我是一名学生，并努力让我的javascript将增值税添加到另一个＆＃39;变量＆＃39;

有人可以协助 - 大桶显示为＆＃34; 0＆＃34;

function calculateTotal(){
  var total = 0;
  var vat = total*0.14;

  for (var k = 0; k < document.forms.service.length; k++)
  {    
    if(document.forms.service.elements[k].checked){
      total+=Number(document.forms.service.elements[k].value);
    }
  }

  document.getElementById("total").innerHTML= "The total is R " + total;
  document.getElementById("vat").innerHTML= "The total VAT is R " + vat;
}

Answer 1

将var vat = total*0.14;移至功能的末尾。计算总数后，您必须计算增值税。

function calculateTotal(){
  var total = 0;

  for (var k = 0; k < document.forms.service.length; k++)
  {    
    if(document.forms.service.elements[k].checked){
      total+=Number(document.forms.service.elements[k].value);
    }
  }

  var vat = total*0.14;
  document.getElementById("total").innerHTML= "The total is R " + total;
  document.getElementById("vat").innerHTML= "The total VAT is R " + vat;
}

将一个变量添加到另一个变量

1 个答案: