How to round to the next largest number?

Question

I want my number to always get rounded to the closes upper number like this:

1.2 => 2

1.4 => 2

Answer 1

You can use the Math.ceil() function.

Math.ceil(1.1) // returns 2

Conversely, if you wanted to round down you'd use Math.floor()

Math.floor(1.8) // returns 1

Here's a demo:

console.table([1, 1.25, 1.49, 1.5, 1.75, 2].map(n => ({
  n,
  ["Math.floor(n)"]: Math.floor(n),
  ["Math.ceil(n)"]: Math.ceil(n),
  ["Math.round(n)"]: Math.round(n),
})));

_{Note: Floor and ceiling functions aren't exclusive to javascript. See this wikipedia entry for more info.}