Rémi Lapeyre <remi.lape...@henki.fr> added the comment: Hi Talha, you are using floating points division which convert its operands to floats so it loose precision for large numbers. The syntax for integer division in Python 3 is // and it will not change the type of its operands. Notice the difference below:
>>> 100000000000000000000000000/10 % 10 4.0 >>> 100000000000000000000000000.0//10 % 10 4.0 >>> 100000000000000000000000000//10 % 10 0 As you can see, in the first example the operand got changed to float which caused a loss of precision and we get the same result when we try directly with a float. Using // gives the expected result. Python use perfect arithmetic for integers but IEEE 754 for floating point calculations. You will find that there is a lot of those "quirks" when using either very large or very small numbers and will need to be mindful of them. In the program you linked, changing '/' to '//' should gives the result you are expecting. ---------- nosy: +remi.lapeyre -furkanonder _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40200> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
