Integer division in Python and R returns interesting wrong numbers [duplicate]

I am curious why the following integer division operation returns a wrong result.

Here's python:

[ins] In [16]: import numpy as np    [ins] In [17]: np.floor(0.84 / 0.02)  Out[17]: 42.0    [ins] In [18]: 0.84 / 0.02  Out[18]: 42.0    [ins] In [19]: 0.84 // 0.02 # should return 42, but..  Out[19]: 41.0    

This happens in R as well

(0.84 %/% 0.02) # returns 41  (0.84 / 0.02) # returns 42  

https://stackoverflow.com/questions/66717753/integer-division-in-python-and-r-returns-interesting-wrong-numbers March 20, 2021 at 10:41AM