javascript - 四舍五入至小数点后两位（仅在必要时）(Round to at most 2 decimal places (only if necessary))

Question

I'd like to round at most 2 decimal places, but only if necessary .

(我想最多舍入小数点后两位，但仅在必要时才可以 。)

Input:

(输入：)

10
1.7777777
9.1

Output:

(输出：)

10
1.78
9.1

How can I do this in JavaScript?

(如何在JavaScript中执行此操作？)

  ask by stinkycheeseman translate from so

Answer 1

使用Math.round(num * 100) / 100