jQuery返回NAN中的数字求和 [英] Summing of numbers in jquery returning NAN

问题描述

我正在尝试对输入数组中的值求和，但是总和一直返回NAN

I'm trying to sum values from an input array but the sum it keeps returning NAN

var sum = 0    //i have also tried parse(0,10);
$(qty_name).each(function(){
    var aValue = $(this).val(); //i have tried parseInt($(this).val(), 10)
    sum += aValue; //i have tried sum = parseInt(sum) + parseInt(aValue)
});
alert(sum);

我不断得到NaN.我来自php背景，所以我从来不需要处理类型转换.请我想念什么?

i keep getting NaN. I'm coming from a php background so i've never had to deal with type casting. Please what am i missing?

推荐答案

这是因为您的其他qty_name没有完美的整数值.对于这样的值，这导致NAN.您需要将值解析为int(或float)以进行任何数学计算:

That is because your other qty_name do not have perfect integer value. which results to NAN for such values. You need to parse the values to int(or float) for doing any mathematical calucations:

 var sum = 0;
 $(qty_name).each(function(){
   sum += parseInt($(this).val()) || 0;
 });
 alert(sum);

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