如何在Javascript中使用零结尾的字符串长度？ [英] How to take the length of a string with zero at the end in Javascript?

问题描述

如何在Javascript结尾处取零字符串的长度？





如果字符串的值为123.45。长度是5，这很好。



但是如果字符串的值是123.40。长度为4而不是5.

解决方案

1。回复评论，以便通知用户。

2.点击改进问题并将代码放在实际问题而不是评论中。

3.你可以'这样做是因为123.40与123.400和123.4000具有相同的精确值，因此您必须将其放入字符串或使用那么多地方对其进行格式化。例如，您可以这样做：

  var  num =  123 。 40 ; 
 num = num.toFixed（ 2 ）;  //  这将确保它总是有2个小数位，以便以0结尾。 

How to take the length of a string with zero at the end in Javascript?


if the value of the string is as "123.45". The length is coming as 5 which is fine.

But if the value of the string is as "123.40". The length is coming as 4 instead of 5.

解决方案

1. Reply to comment so that the user is notified.
2. Click improve question and put your code in the actual question instead of in a comment.
3. You can't do it like that because 123.40 is the same exact value as 123.400 and 123.4000 so you'll have to put it into a string or format it with that many places. For example you can do:

var num = 123.40;
num = num.toFixed(2); // this will make sure it always has 2 decimal places so that ending in 0 is accounted for.

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