CODEWITHSUNDEEP
python-2.7python-3.4
Shupeng Xu
Shupeng Xu

Reputation: 31

Confused about the different results between using Python 2.7 and Python 3.4

When I ran the following Python code, I got different results using Python 2.7 and Python 3.4, I have no idea why...

import sys

def main():
    total = 0
    number = 568

    while number:
        total += number % 10
        print("total = %d" % total)
        number /= 10


if __name__ == '__main__':
    main()

Output result using Python 2.7:

total = 8

total = 14

total = 19

Output result using Python 3.4(I deleted some output because it's too long):

total = 8

total = 14

total = 20

total = 21

total = 21

total = 21

..........

Upvotes: 2

Views: 47

Answers (1)

Mark Tolonen
Mark Tolonen

Reputation: 178254

Python 2.X implements integer division, so 568 / 10 = 56.

Python 3.X implements true division, so 568 / 10 = 56.8.

Change "total = %d" to "total = %f" to see the difference.

To force integer division, use // instead of /.

To make Python 2 work like Python 3, add from __future__ import division to the top of the script.

Upvotes: 3

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