originally published 4/26/2018 on the Hashrocket TIL blog

To remove everything after the decimal point in a floating-point number, use Kernel.trunc/1.

iex> Kernel.trunc(3.141)
3
iex> Kernel.trunc(-3.141)
-3

Alternatively, you can simply type trunc

iex> trunc(3.141)
3

Photo by Jonny Caspari on Unsplash