JavaScript：使用加号显示正数 [英] JavaScript: Display positive numbers with the plus sign

问题描述

我如何显示正数，例如3为+3，负数如-5为-5？所以，如下：

How would I display positive number such as 3 as +3 and negative numbers such -5 as -5? So, as follows:

1,2,3进入+1，+ 2，+ 3

1, 2, 3 goes into +1, +2, +3

但如果那些是

-1，-2，-3则进入-1，-2，-3

-1, -2, -3 then goes into -1, -2, -3

推荐答案

你可以使用这样一个简单的表达式：

You can use a simple expression like this:

(n<0?"":"+") + n

如果数字，条件表达式会产生一个加号是正数，如果数字是负数，则为空字符串。

The conditional expression results in a plus sign if the number is positive, and an empty string if the number is negative.

您尚未指定如何处理零，所以我假设它将显示为 0 。如果要将其显示为 0 ，请改为使用< = 运算符：

You haven't specified how to handle zero, so I assumed that it would be displayed as +0. If you want to display it as just 0, use the <= operator instead:

(n<=0?"":"+") + n

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