javascript - Round to at most 2 decimal places (only if necessary)

itemprop="text">

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

Input:

10
1.7777777
9.1

Output:

10
1.78
9.1

How
can I do this in JavaScript?

itemprop="text">

class="normal">Answer

Use
Math.round(num * 100) / 100