## C (tcc), <del>39</del> <del>21</del> 10 bytes
I was actually quite surprised nobody thought of using C.
```
f(int i){}
```
This is not an identity function as it seems to be. The implicit int type of the f function trunctuates the floating-point.

[TIO](https://tio.run/##S9YtSU7@/z9NIy0nP7FEIVOzuii1pLQoTyHTuvZ/bmJmnoamQjUXZ0FRZl5JmoaSaoqSjkKahqmeiaamNVftfwA)
JoKing-11B