The BigInteger in C#

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The BigInteger in C#

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[@mdalaminmahamud3775]

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[@proka1]

There was a problem on codechef at some point, and this class would have been useful :) Thanks!

[@mathboy8188]

10,000! is a 35,000+ digit number (Stirling's Approximation)
Mind blown.
( I scanned the output by pausing the video a few times, and sure enough, the program calculated the absolutely correct value for the integer 10,000! )
( Joking aside, you actually could do a consistency check by considering all the multiple of 5 and 10 from 1 to 10,000, and so determining how many initial zeros 10,000! should have.)
( There's more than sufficient powers of 2 to match each multiple of 5, but it would be a non-trivial calculation because things like 25 produce a 0 as expected when multiplied by 2, but they "return" a new 5 (2*25 = 50), and so eventually accounts for two zeros, not one (4*25 = 100). Likewise, 125 * 8 = 1000, and so the 125 factor in 10,000! accounts for 3 initial zeros in the final result.)

[@crimson_star1341]

If i get the value returned as System.Numerics.BigInteger instead of a number, does that mean it's too big of number or do i need to access it a different way ?

[@ЮрийЛипко]

I'm so bad at C # that I didn't think of it. Thanks a lot!

[@НектоЛохматый]

Thank you, that's useful, but, please, never multiply by 1 ! (You should better start your for-cycle from 2)

[@tjrff]

Thank you very simple and specific. Keep the videos coming.

[@plazmaonfly1]

wht is the diff between BigInterger and int64??
... i think BigInterger's underlaying type is int64 ... and for int64 you do not need to add seprate assembly to your program

[@stewartzayat7526]

Bigint is not limited in size unlike Int64, which is limited to be in range -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.

[@nosirovbehzodjon]

Thank you

[@LawnMeower]

my life has just gotten easier.. thank you!

[@mdalaminmahamud3775]

I tested with some inputs and it is unable to compute more than fact(30000). But Overall the experience was awesome.

[@ddr1706]

Did you order pizza

[@carlmarionmanlapaz4697]

thank you

[@khiladibabu]

I have faced this question in my C# interview, at that time I have no clue thanks for clarification.

[@DamienSawyer]

It could be nothing, but all of those 0's a the end of your result look suspicious. Perhaps it's just the result.

[@hoomanhajiabadi3420]

Exactly what i was looking for, thanks

[@carlovelasquez7644]

It's 2019 and this video is still very useful, thanks!

[@muhammadehsanullah]

owosome