Factorial function in AMPL

[Sourav Mondal]

Hi all,

I am trying to write a code for my ILP. I need to use a factorial function like this: factorial(n) = n*(n-1)*...*1.

What is the best possible method to implement this? There are several library functions for sin, cos etc., but, can't find one for the factorial.

Thanks,

Sourav

[Robert Fourer]

factorial(n) can be computed by the AMPL expression

prod {i in 1..n} i

Bob Fourer
am...@googlegroups.com

=======