how to do round half even in javascript unlimited digits after point?

问题

I want to have 26.955 rounded to 26.96

I mean if I have numbers 0-4 I want to round them down and if they are 5-9 I want to round them up

I considered parseFloat(number).toFixed(2) however it returns me 26.95, I need 26.96 I used Math.round but this doesn't work either, I saw Math.round10 but it told me this function doesn't exist so I don't know how to solve my problem.

UPDATE: I don't have always 3 digits after point I have more than that I would have 26.956736489

your mentioned duplicate talks about .fixed(2) I am saying it is not working for half even it is not a duplicate

回答1:

Try

Math.round(29.955*100)/100; //29.96

Or cool functional approach

function round(n) {
   n = Math.pow(10,n);
   return function(num) {
       return Math.round(num*n)/n;
   }
}

var round2 = round(2);
var num = 29.9555;
console.log(round2(num));

回答2:

use this:

var num=26.955
Math.round(num* 100) / 100;

来源：https://stackoverflow.com/questions/26806234/how-to-do-round-half-even-in-javascript-unlimited-digits-after-point