int multiplication with float = WHAT?

Asked Oct 23 '14 at 11:38

Active Oct 23 '14 at 11:38

Viewed 37 times

The snippet below seems very very very strange to me. The result should be -3.6.. Some rounding failure or have i missed something here?

Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AM
D64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> -5.0+float(14)*0.1
-3.5999999999999996
>>>

asked Oct 23 '14 at 11:38

kungcc

1,832
5
25
48

2

Perfectly normal behaviour of floating point arithmetic. – Bartosz Marcinkowski Oct 23 '14 at 11:40
See also this: [What Every Computer Scientist Should Know About Floating-Point Arithmetic](http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html) – Adriano Repetti Oct 23 '14 at 11:41
1

welcome to the [secret club](http://stackoverflow.com/a/11950951/674039) ! – wim Oct 23 '14 at 11:45

int multiplication with float = WHAT?

0 Answers0