## Question

Asked By – Casebash

So Python has positive and negative infinity:

```
float("inf"), float("-inf")
```

This just seems like the type of feature that has to have some caveat. Is there anything I should be aware of?

**Now we will see solution for issue: Python Infinity – Any caveats? **

## Answer

You can still get not-a-number (NaN) values from simple arithmetic involving `inf`

:

```
>>> 0 * float("inf")
nan
```

Note that you will normally *not* get an `inf`

value through usual arithmetic calculations:

```
>>> 2.0**2
4.0
>>> _**2
16.0
>>> _**2
256.0
>>> _**2
65536.0
>>> _**2
4294967296.0
>>> _**2
1.8446744073709552e+19
>>> _**2
3.4028236692093846e+38
>>> _**2
1.157920892373162e+77
>>> _**2
1.3407807929942597e+154
>>> _**2
Traceback (most recent call last):
File "<stdin>", line 1, in ?
OverflowError: (34, 'Numerical result out of range')
```

The `inf`

value is considered a very special value with unusual semantics, so it’s better to know about an `OverflowError`

straight away through an exception, rather than having an `inf`

value silently injected into your calculations.

This question is answered By – Greg Hewgill

**This answer is collected from stackoverflow and reviewed by FixPython community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 **