如何在JQuery中进行算术运算? [英] How to conduct arithmetic operations in JQuery?

问题描述

var price     = $('#addprice').val();
var pass      = $('#pass').val();
var total     = $('#totalprice').attr('value')
var left      = $('#leftquota').attr('value')
var balance   = $('#balance').attr('value')
var tprice    = total + price;   // total price
var bprice    = balance + price; // balance price
var unitprice = bprice / left;   // unit price

$('#totalprice').text(tprice);
$('#balance').text(bprice);
$('#unitprice').text(unitprice);

jQuery只处理总计，剩余，余额，tprice，bprice，单价等.作为字符串，但实际上是小数而不是字符串.当我将parseInt()应用于它们时，它们都变成整数，这不是我想要的.如何进行算术运算?操作数是小数.

JQuery just treats total, left, balance, tprice, bprice, unitprice,etc. as strings, but actually there are decimals rather than strings. When I apply parseInt() to them, they all become integers, which are not what I want. How to conduct arithmetic operations? The operands are decimals.

我使用parseFloat();但是是一样的var tprice = total + price的运算；只是在字面上将两个小数(字符串)共轭在一起.

I use parseFloat(); but it is the same. The operation of var tprice=total+price; just literally conjugates two decimals(strings) together.

$('#add_price').click(function(){
    var price=$('#addprice').val();
    var pass=$('#pass').val();
    var total=$('#totalprice').attr('value')
        var left=$('#leftquota').attr('value')
        var balance=$('#balance').attr('value')
        total=parseFloat(total);
        left=parseFloat(left);
        balance=parseFloat(balance);
        var tprice=total+price;
        var bprice=balance+price;
        var unitprice=bprice/left;

        $('#totalprice').text(tprice);
        $('#balance').text(bprice);
        $('#unitprice').text(unitprice);

推荐答案

，您可以使用 parseFloat 在这种情况下.它将返回浮点值

you can use parseFloat for this case. it will return float value

用法示例:

var tprice = parseFloat(total) + parseFloat(price);

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