Very strange thing in python3

Question

print(int( 342342342342342342 / 10 ))

The output is

34234234234234236

I do not understand where the 6 comes from! I also tried "long" which gives an error.

Pretty sure it is to do with `float` Representation Error. https://docs.python.org/2/tutorial/floatingpoint.html or https://docs.python.org/3.6/tutorial/floatingpoint.html — Alex Fung, Jul 25 '18 at 12:02
`342342342342342342 / 10` → `3.4234234234234236e+16` → [Is floating point math broken?](https://stackoverflow.com/questions/588004/is-floating-point-math-broken) — deceze, Jul 25 '18 at 12:03

CodeCupboard · Accepted Answer · 2018-07-25T12:07:14.580

1

You might be better using the integer division // operator.

print( 342342342342342342 // 10 )

As others have commented, floating points in python have some interesting results.

The common example of this is:

int(2.5)

Returns

edited Jul 25 '18 at 12:07

answered Jul 25 '18 at 12:03

CodeCupboard

1 Answers1