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Date: Wed, 28 Apr 2021 00:03:50 -0700 (PDT)
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Subject: Re: Constraint error overflow
From: Richard Iswara <haujekchifan@gmail.com>
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On Tuesday, April 27, 2021 at 10:59:57 PM UTC+7, Dmitry A. Kazakov wrote:
> On 2021-04-27 17:32, Richard Iswara wrote: 
> > On Tuesday, April 27, 2021 at 10:00:22 PM UTC+7, Dmitry A. Kazakov wrote: 
> >> On 2021-04-27 16:04, Richard Iswara wrote: 
> >>> Ada beginner here. I was trying to multiply the first 100 integer and GNAT throw me a constraint error, overflow. I check the error was on integer 13. So what did I do wrong here? 
> >> Nothing, it is just so that 
> >> 
> >> 14! > 2**31 - 1
> > So the compiler is restricted to 32 bit integer value. I had hoped for 64 bit to get 18 digits.
> That won't give you 100! That is 158 digits or so. 
> 
> Long_Float gamma function should do the trick, or arbitrary precision 
> integer arithmetic.
> -- 
> Regards, 
> Dmitry A. Kazakov 
> http://www.dmitry-kazakov.de


Thank you all of you who responded and give very helpful advices. i am very much an amateur beginner in programming . .