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Re: Trailing zeros of 100!

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From "yehudak ." <katye2007@gmail.com>
Newsgroups comp.lang.python
Subject Re: Trailing zeros of 100!
Date Sat, 2 Jan 2016 15:14:34 +0200
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Vlastimil,
Thank you so much, but...
All that is Chinese for me.
Can you show a 'normal' Python code for me?

Yehuda

On Sat, Jan 2, 2016 at 2:44 PM, Vlastimil Brom <vlastimil.brom@gmail.com>
wrote:

> 2016-01-02 12:49 GMT+01:00  <katye2007@gmail.com>:
> > Hi, newbie here!
> > I'm trying to write a python program to find how many trailing zeros are
> in 100! (factorial of 100).
> > I used factorial from the math module, but my efforts to continue
> failed. Please help.
> >
> > Thank you,
> > Yehuda
> > --
> > https://mail.python.org/mailman/listinfo/python-list
>
> Hi,
> rather an illustration of the available tools in python, than a
> (submittable) solution:
>
> >>> import re, math
> >>> len(re.search(r"0*$", str(math.factorial(100))).group())
> 24
> [or the same code on more lines with some indentation - if it is
> preserved via e-mail]
> >>> len(
> ...     re.search(
> ...         r"0*$",
> ...         str(
> ...             math.factorial(100)
> ...             )
> ...         ).group()
> ...     )
> 24
> >>>
>
> I.e. You need the length of the string resulting as the match of the
> regular expression search for a pattern representing zero or more "0"
> at the end of the input text, which is the string version of 100!
>
> Of course, there are other ways to get this result :-)
>
> regards,
>     vbr
>

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Thread

Trailing zeros of 100! katye2007@gmail.com - 2016-01-02 03:49 -0800
  Re: Trailing zeros of 100! David <bouncingcats@gmail.com> - 2016-01-02 23:19 +1100
  Re: Trailing zeros of 100! katye2007@gmail.com - 2016-01-02 04:34 -0800
  Re: Trailing zeros of 100! Vlastimil Brom <vlastimil.brom@gmail.com> - 2016-01-02 13:44 +0100
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 15:14 +0200
    Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-02 16:57 +0100
      Re: Trailing zeros of 100! Tony van der Hoff <tony@vanderhoff.org> - 2016-01-02 17:09 +0100
        Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-02 17:56 +0100
          Re: Trailing zeros of 100! Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-02 15:24 -0200
          Re: Trailing zeros of 100! Chris Angelico <rosuav@gmail.com> - 2016-01-03 08:57 +1100
            Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-03 01:02 +0100
              Re: Trailing zeros of 100! Ben Finney <ben+python@benfinney.id.au> - 2016-01-03 11:20 +1100
              Re: Trailing zeros of 100! srinivas devaki <mr.eightnoteight@gmail.com> - 2016-01-03 07:16 +0530
          Re: Trailing zeros of 100! Tony van der Hoff <tony@vanderhoff.org> - 2016-01-03 11:53 +0100
  Re: Trailing zeros of 100! Joel Goldstick <joel.goldstick@gmail.com> - 2016-01-02 09:57 -0500
  Re: Trailing zeros of 100! Vlastimil Brom <vlastimil.brom@gmail.com> - 2016-01-02 16:24 +0100
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 15:30 +0000
  Re: Trailing zeros of 100! Robin Koch <robin.koch@t-online.de> - 2016-01-02 16:54 +0100
    Re: Trailing zeros of 100! Peter Otten <__peter__@web.de> - 2016-01-02 18:18 +0100
  Re: Trailing zeros of 100! Tim Chase <python.list@tim.thechases.com> - 2016-01-02 10:33 -0600
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 19:34 +0200
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 17:44 +0000
    Re: Trailing zeros of 100! Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-03 00:36 +0100
  Re: Trailing zeros of 100! Serhiy Storchaka <storchaka@gmail.com> - 2016-01-02 20:28 +0200
  Re: Trailing zeros of 100! Vlastimil Brom <vlastimil.brom@gmail.com> - 2016-01-02 19:29 +0100
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 22:02 +0200
  Re: Trailing zeros of 100! "yehudak ." <katye2007@gmail.com> - 2016-01-02 22:09 +0200
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 21:25 +0000
  Re: Trailing zeros of 100! Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-02 21:26 +0000

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