mirror of
https://github.com/satwikkansal/wtfpython.git
synced 2024-08-17 16:10:42 +03:00
Minor formatting fix
This commit is contained in:
parent
897b915f11
commit
9fc6db6215
10
README.md
vendored
10
README.md
vendored
@ -2559,7 +2559,7 @@ It seems as though Python rounded 2.5 to 2.
|
||||
|
||||
#### 💡 Explanation:
|
||||
|
||||
This is not a float precision error, in fact, this behavior is intentional. Since Python 3.0, `round()` uses [banker's rounding](https://en.wikipedia.org/wiki/Rounding#Round_half_to_even) where .5 fractions are rounded to the nearest **even** number:
|
||||
- This is not a float precision error, in fact, this behavior is intentional. Since Python 3.0, `round()` uses [banker's rounding](https://en.wikipedia.org/wiki/Rounding#Round_half_to_even) where .5 fractions are rounded to the nearest **even** number:
|
||||
|
||||
```py
|
||||
>>> round(0.5)
|
||||
@ -2577,11 +2577,9 @@ This is not a float precision error, in fact, this behavior is intentional. Sinc
|
||||
2.0
|
||||
```
|
||||
|
||||
This is the recommended way to round .5 fractions as described in [IEEE 754](https://en.wikipedia.org/wiki/IEEE_754#Rounding_rules). However, the other way (round away from zero) is taught in school most of the time, so banker's rounding is likely not that well known. Furthermore, some of the most popular programming languages (for example: JavaScript, Java, C/C++, Ruby, Rust) do not use banker's rounding either. Therefore, this is still quite special to Python and may result in confusion when rounding fractions.
|
||||
|
||||
See the [round() docs](https://docs.python.org/3/library/functions.html#round) or [this stackoverflow thread](https://stackoverflow.com/questions/10825926/python-3-x-rounding-behavior) for more information.
|
||||
|
||||
Note that `get_middle([1])` only returned 1 because the index was `round(0.5) - 1 = 0 - 1 = -1`, returning the last element in the list.
|
||||
- This is the recommended way to round .5 fractions as described in [IEEE 754](https://en.wikipedia.org/wiki/IEEE_754#Rounding_rules). However, the other way (round away from zero) is taught in school most of the time, so banker's rounding is likely not that well known. Furthermore, some of the most popular programming languages (for example: JavaScript, Java, C/C++, Ruby, Rust) do not use banker's rounding either. Therefore, this is still quite special to Python and may result in confusion when rounding fractions.
|
||||
- See the [round() docs](https://docs.python.org/3/library/functions.html#round) or [this stackoverflow thread](https://stackoverflow.com/questions/10825926/python-3-x-rounding-behavior) for more information.
|
||||
- Note that `get_middle([1])` only returned 1 because the index was `round(0.5) - 1 = 0 - 1 = -1`, returning the last element in the list.
|
||||
|
||||
---
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user