How to ''round to 2 decimal places in Javascript''.

Question

Hello, everyone! I'm new to Javascript. I want to round to 2 decimal places in javascript, but I don't know how to do this.

Input:

12
2.7777777
6.1

Output:

12
2.78
6.1

It is my final exam question, it's very important. Please help me. Thanks!

lyytutoria · Accepted Answer

Don't worry, I will help you.

To round to 2 decimal places in Javascript, you can use the followingg ways:

Math.round(num * 100) / 100

Particular, to make sure some values as 3. 005 to be rounded exactly, let's use Number.EPSILON :

Math.round((num + Number.EPSILON) * 100) / 100

3. Another solution is using the custom function:

Some problems with the values as 2.005 can be avoided by this way:

roundToTwo(2.005) 
2.01 
roundToTwo(12) 
12 
roundToTwo(2.7777777) 
2.78 
roundToTwo(6.1) 
6.1 
roundToTwo(4214.5678) 
4214.57

I hope that these suggestion will be useful for you. Good lucks!!!

Solutions