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How to convert float to integer?

#troubleshooting#learning-elixir#integer
xgeek116

xgeek116

Hello,

I have a specific need to convert floats that have only 0 (as fraction) for example :

6.0 => 6
6.2 => I need it to stay float

Thanks

3 comments
#troubleshooting#learning-elixir#integer
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benwilson512

benwilson512

Author of Craft GraphQL APIs in Elixir with Absinthe

One option:

def maybe_to_int(float) do
  truncated = trunc(float)
  if truncated == float, do: truncated, else: float
end

Basically just convert the float to an integer. If they evaluate as equal then it must have had no decimal part. If they are no longer equal, return the float.

7
Post #1
mindok

mindok

Strangely (give vagaries of floats and equality testing across numeric types), this seems to work!

0
Post #2
adamu

adamu

What 1.0 == 1 actually does is convert 1 to 1.0 and compare the same types, which is why it works.

2
Post #3
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