JavaScript:用加号显示正数
如何将正数(如 3)显示为 +3，将负数(如 -5)显示为 -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
但如果是的话
-1, -2, -3 然后进入 -1, -2, -3
-1, -2, -3 then goes into -1, -2, -3
推荐答案
你可以使用这样的简单表达式:
You can use a simple expression like this:
(n<0?"":"+") + n
如果数字为正，条件表达式产生一个加号，如果数字为负，则返回一个空字符串.
The conditional expression results in a plus sign if the number is positive, and an empty string if the number is negative.
你还没有指定如何处理零，所以我假设它会显示为 +0.如果您只想将其显示为 0，请改用 <= 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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