John Backus passes away...

Chuck Guzis cclist at
Wed Mar 21 16:46:22 CDT 2007

On 21 Mar 2007 at 15:09, woodelf wrote:

> But then a ISZ style loop seems to map to Fortran better.
> Algol loops seem to imply a AC style testing. Also Algol
> seems to require some sort of index register, something
> many machines do not have.Algol for the PDP-8 gets around
> this as you can not comnile subroutines.

Or a BXLE or IBXLE or any number of other implementations on various 
mainframes.  I believe that most FORTRAN IV implementations 
guaranteed that the DO-loop would be executed at least once, 
regardless of the intial values, something not shared with Algol.


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