What is the best way to round a float in elixir

Question

I am trying to round a Float in elixir to 2 decimal places.

If I have the number 12.555, I would like my rounding function to return 12.56

I originally thought that the Float.round was what I wanted but this function does not always return the answer I would like.

For example...

iex()> Float.round(12.555, 2)
12.55

I know that I can get this done with a makeshift function but I thought that there must be a better solution.

My current solution is...

iex()> round(12.555 * 100) / 100
12.56

This does the job but like I said, I just wanted to know if there was a better solution.

Thanks in advance

Answer 1

Float.ceil/2 might help you with this if you don't want to use a library

iex> 12.555 |> Float.ceil(2)        
12.56