[issue43034] Python tutorial misleads users about floor division behavior

Terry J. Reedy report at bugs.python.org
Fri Jan 29 15:12:45 EST 2021


Terry J. Reedy <tjreedy at udel.edu> added the comment:

-17/3 = -5.666666666666667 = -6.0 + .333333333333333.  It is the latter fraction that gets discarded.

However, this is a frequent source of confusion.  How about adding 

>>> -17 // 3
-6
>>> -17 % 3
1
>>> -6 * 3 + 1
-17

to illustrate what we mean, without footnote or additional text.

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nosy: +terry.reedy

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