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From: R Daneel Olivaw <Danny@hyperspace.vogon.gov>
Newsgroups: comp.lang.fortran
Subject: Re: Is there a way in Fortran to designate an integer value as
 integer*8 ?
Date: Thu, 3 Oct 2024 14:45:31 +0200
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Lynn McGuire wrote:
> I need many of my integers to be integer*8 in my port to 64 bit.  In 
> C/C++ code, I can say 123456L to mean a long long value, generally 64 
> bit.  Is there a corresponding way to do this in Fortran or am I stuck 
> with:
> 
>      call xyz (1)
> 
>      subroutine xyz (ivalue)
>      integer*8 ivalue
>      ...
>      return end
> 
> must be:
> 
>      integer*8 ivalue
>      ...
>      ivalue = 1
>      call xyz (ivalue)
> 
> Thanks,
> Lynn
> 

This is not actually a Fortran issue as such, it's all about a specific 
compiler (GNU Fortran).