How to round a number in javascript?

Question

JavaScript

It is necessary that all non-integer numbers be rounded up to 0.5, that is, let's say I get the number 2, it remains two, if I get the number 2.1 or 2.7, then the number should be converted to 2.5, how to do this?

Answer 1

it is possible like this:

function round(x) {
  var t = Math.floor(x);
  return (t === x) ? t : t + 0.5;
}