尝试添加一个数组,但结果返回NaN [英] Trying to add up an array, but result returns NaN
问题描述
所以我有一个名为hoursString的字符串,看起来像
4.3 | 2.4 | 3.4 | 3.0 | 2.64 | 3.0 | 1.0 | 0.0 | 2.6 | 3.4 |
我将字符串拆分为一个数组,我试图做的是将所有数字加起来将其返回到divtest中的html页面。
JAVASCRIPT:
var hours = hoursString.split(| );
var total = 0;
for(var i = 0; i {
total + = hours [i];
}
document.getElementById(test)。innerHTML = total;
结果是NaN。有人能告诉我我做错了什么吗?
Thanks!
4.3 | 2.4 | 3.4 | 3.0 | 2.64 | 3.0 | 1.0 | 0.0 | 2.6 | 3.4 |
删除最后一个|,split会在数组的末尾添加一个空字符串, NaN和NaN +的数值计算结果为NaN b
$ b 编辑:是的,parseFloat也是必须的,否则结果将是一个字符串而不是NaN
So I have a string called hoursString that looks like
4.3|2.4|3.4|3.0|2.64|3.0|1.0|0.0|2.6|3.4|
I split the string into an array and what I am trying to do is add up all the numbers and return it to the html page in the div "test".
JAVASCRIPT:
var hours=hoursString.split("|");
var total=0;
for (var i=0;i<hours.length;i++)
{
total += hours[i];
}
document.getElementById("test").innerHTML=total;
The result is NaN. Can someone tell me what I am doing wrong? Thanks!
4.3|2.4|3.4|3.0|2.64|3.0|1.0|0.0|2.6|3.4|
remove the last |, split will otherwise add an empty string at the end of the array which will give NaN and NaN + number evaluates to NaN
edit: and yes, parseFloat is necessary too, otherwise the result will be a string instead of NaN
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