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0**0 should raise an error #45802

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jmgillet mannequin opened this issue Nov 19, 2007 · 3 comments
Closed

0**0 should raise an error #45802

jmgillet mannequin opened this issue Nov 19, 2007 · 3 comments
Labels
interpreter-core (Objects, Python, Grammar, and Parser dirs) type-bug An unexpected behavior, bug, or error

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@jmgillet
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Mannequin

jmgillet mannequin commented Nov 19, 2007

BPO 1461
Nosy @gvanrossum

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = <Date 2007-11-19.17:21:36.378>
created_at = <Date 2007-11-19.10:46:53.949>
labels = ['interpreter-core', 'type-bug']
title = '0**0 should raise an error'
updated_at = <Date 2007-11-19.17:21:36.358>
user = 'https://bugs.python.org/jmgillet'

bugs.python.org fields:

activity = <Date 2007-11-19.17:21:36.358>
actor = 'gvanrossum'
assignee = 'none'
closed = True
closed_date = <Date 2007-11-19.17:21:36.378>
closer = 'gvanrossum'
components = ['Interpreter Core']
creation = <Date 2007-11-19.10:46:53.949>
creator = 'jmgillet'
dependencies = []
files = []
hgrepos = []
issue_num = 1461
keywords = []
message_count = 3.0
messages = ['57631', '57632', '57640']
nosy_count = 2.0
nosy_names = ['gvanrossum', 'jmgillet']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue1461'
versions = ['Python 2.5']
@jmgillet jmgillet mannequin added the type-bug An unexpected behavior, bug, or error label Nov 19, 2007
@jmgillet
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jmgillet mannequin commented Nov 19, 2007

The result is actually undefined, as x**0 gives 1 and 0**x gives 0.

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> 1**0
1
>>> 0**1
0
>>> 0**0
1

@jmgillet jmgillet mannequin added the interpreter-core (Objects, Python, Grammar, and Parser dirs) label Nov 19, 2007
@jmgillet
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jmgillet mannequin commented Nov 19, 2007

See http://en.wikipedia.org/wiki/Exponentiation "Zero to the zero
power". There are pros and cons of 0**0==1 so if you mark this one as
"wontfix" I promise not to bother you again :-)

@gvanrossum
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Right.

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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