Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Not only is mdillon's solution correct, it's also much more efficient as each factorial is simply one multiply on the previous one, whereas calling the function each time means a lot more work is being done.

Now the reason for the failure is that the Math::NumberCruncher function overflows for 171!. Unfortunately it returns '1.#INF' which Perl happily treats as 1.0 in your division, so you simply divide by one from that point on, not making much more progress.

Update: While Math::NumberCruncher does not use BigFloats for it's factorial function, it does already use the Math::BigFloat module for storing its very large version of $PI (though strangely BigFloats are not used in calculations with that $PI so it's probably pointless...), so it is a trivial matter to patch Math::NumberCruncher to use a BigFloat for the factorial. This is of course for occasional uses as for an iterative use of factorial mdillon's answer is still much faster.

I'd like to be able to assign to an luser

In reply to Re: Calculating e by Albannach
in thread Calculating e by sifukurt

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (5)
As of 2022-05-22 11:52 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (80 votes). Check out past polls.