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You need to use Stirling's formula, which asymptotically goes as n^n e^(-n). I'd prob take the log of this as a first calculation, or do something to avoid the n^n.
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In fact, n^n e^(-n) = exp( n ln(n) - n ), so calculate the argument and take the exponential (natural).
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nyc_user wrote: You need to use Stirling's formula,
Yes but... this is an approximation (admittedly with an error approaching 1/n^2 for n=1000) and won't be good enough if the exact value is required.
...Steve
1. quod erat demonstrandum
2. "Give a man a fish and you've fed him for a day. Teach him how to fish and you've fed him for life." I read that somewhere once 
(Translation: I'll show you the way, but not write the code for you.)
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That's virtually an absurd comment. The guy didn't give a type, so I might guess a double (or long would be better). Moreover, the leading coefficietly are easily googlable.
If he wants all the digits down to the decimal point then that's a completely different problem. 
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nyc_user wrote: That's virtually an absurd comment.
Absurd? Hmmm....
nyc_user wrote: The guy didn't give a type, so I might guess a double (or long would be better).
The answer to 1000! is a whole number. So my comment still stands. Stirling's formula approximates the actual value (albeit a very good approximation) - there is some error involved.
nyc_user wrote: If he wants all the digits down to the decimal point then that's a completely different problem.
Yep I agree, however since he has not given us any more information on the assignment question, this discussion is academic.
...Steve
1. quod erat demonstrandum
2. "Give a man a fish and you've fed him for a day. Teach him how to fish and you've fed him for life." I read that somewhere once
(Translation: I'll show you the way, but not write the code for you.)
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1000! =
402387260077093773543702433923003985719374864210714632543799910429938512398
629020592044208486969404800479988610197196058631666872994808558901323829669
944590997424504087073759918823627727188732519779505950995276120874975462497
043601418278094646496291056393887437886487337119181045825783647849977012476
632889835955735432513185323958463075557409114262417474349347553428646576611
667797396668820291207379143853719588249808126867838374559731746136085379534
524221586593201928090878297308431392844403281231558611036976801357304216168
747609675871348312025478589320767169132448426236131412508780208000261683151
027341827977704784635868170164365024153691398281264810213092761244896359928
705114964975419909342221566832572080821333186116811553615836546984046708975
602900950537616475847728421889679646244945160765353408198901385442487984959
953319101723355556602139450399736280750137837615307127761926849034352625200
015888535147331611702103968175921510907788019393178114194545257223865541461
062892187960223838971476088506276862967146674697562911234082439208160153780
889893964518263243671616762179168909779911903754031274622289988005195444414
282012187361745992642956581746628302955570299024324153181617210465832036786
906117260158783520751516284225540265170483304226143974286933061690897968482
590125458327168226458066526769958652682272807075781391858178889652208164348
344825993266043367660176999612831860788386150279465955131156552036093988180
612138558600301435694527224206344631797460594682573103790084024432438465657
245014402821885252470935190620929023136493273497565513958720559654228749774
011413346962715422845862377387538230483865688976461927383814900140767310446
640259899490222221765904339901886018566526485061799702356193897017860040811
889729918311021171229845901641921068884387121855646124960798722908519296819
372388642614839657382291123125024186649353143970137428531926649875337218940
694281434118520158014123344828015051399694290153483077644569099073152433278
288269864602789864321139083506217095002597389863554277196742822248757586765
752344220207573630569498825087968928162753848863396909959826280956121450994
871701244516461260379029309120889086942028510640182154399457156805941872748
998094254742173582401063677404595741785160829230135358081840096996372524230
560855903700624271243416909004153690105933983835777939410970027753472000000
000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000
---
Steini
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Good one! My comments really are academic
...Steve
1. quod erat demonstrandum
2. "Give a man a fish and you've fed him for a day. Teach him how to fish and you've fed him for life." I read that somewhere once
(Translation: I'll show you the way, but not write the code for you.)
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int i,f;
f=1;
string factorial="";
for (i=1; i<=1000;i++)
{
f= f*i;
factorial = f.ToString();
//additional
/*if(i==33)
{
break;
}
*/
}
this.label1.Text = factorial;
but u can get factorial until 33 otherwise 1000! gives u result 0 (zero)
_____________________
Proud to be Albanian
_____________________
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Congratulations!! You just did his homework for him!!
And WOW, he didn't learn a damn thing!! 
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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albCode wrote: but u can get factorial until 33 otherwise 1000! gives u result 0 (zero)
The problem is that you've defined f as an int. You'll need to use a different data type.
...Steve
1. quod erat demonstrandum
2. "Give a man a fish and you've fed him for a day. Teach him how to fish and you've fed him for life." I read that somewhere once 
(Translation: I'll show you the way, but not write the code for you.)
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"u have right" (maybe)
_____________________
Proud to be Albanian
_____________________
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We don't do your homework. Where exactly are you stuck?
Just a hint: look up the term "faculty" in google.
regards
modified 12-Sep-18 21:01pm.
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rockxyuenmandem! when i hear of ur cheating i cried loudly. i not want my student to cheat on cpian but u have failed me u monkey turd! now i want to die
Sincelery yours, Computer Information conSciences Professor and grader, Sharada Ulhas
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sorry maybe i shouldnt answer,
I really apologise
_____________________
Proud to be Albanian
_____________________
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HAAHA are you indian?
/\ |_ E X E GG
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Dude if u asking me do i am indian. the answer is false. I am Europen(Kosovo-Albanian) 
_____________________
Proud to be Albanian
_____________________
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You're still old a week after your last attack.
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O Dan, thou hast shown unto me thine utmost kindness, and thine words speak in songs of beauty and elegance.
Sincelery yours, Computer Information conSciences Professor and grader, Sharada Ulhas
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You would think they would catch
on by now.. Keep up the good
work bagging them...
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You think his students should
cheat? I feel he is being kind!
I wait till the end of the
semester before telling them
I caught them cheating and then
fail them.
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Professor Sharada Ulhas wrote: Sincelery yours, Computer Information conSciences Professor and grader, Sharada Ulhas
Professor? If this is an example of an assignment at your university, you may want to put a "stop" on that tuition cheque...
Share and enjoy.
Sean
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>If this is an example of an assignment at your university, you may want to >put a "stop" on that tuition cheque...
Could you please elaborate? I'm dying to find out
how you came to this conclusion from the info you
had? Please hurry with your reply, we may have
stumbled upon a savant.
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Is there a tooltip availabe which is bind to a control and to an object?
Regards
Hansjörg
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Everything I'm doing is on .NET 2003.
I just wrote a C# class library and compiled it, no problem. Then I started a new C# project that uses the library (let's call this app the controller) and referenced my lib. I also added the "using Library;" line at the top of the controller app.
When typing code in the MS IDE I see the classes w/in the lib (Library. gives a list of public classes) but members and methods do not appear. (Library.class. gives an empty list other than the MS base methods).
When I use public methods by hard-typing, everything compiles.
How do I get intellisense to work?
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I'm replying to myself to extend the question:
Is this a pb with namespaces and class names? The structure of symbols is:
namespace CLib
{
interface IC
{
}
public C : IC
{
}
}
I put "using CLib" in my controller app.
Thx.
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