product(ZZ,Function) -- product of consecutive values of a function

product(ZZ,Function) -- product of consecutive values of a function

Synopsis:

Function: product

Input:

an instance of class ZZ.

an instance of class Function.

product(n,f) -- compute the product f(0) * f(1) * ... * f(n-1).

i1 : product(5, i -> 2*i+1)



o1 = 945

See also:

product

Code:

     -- ../../../Macaulay2/m2/lists.m2:76-82
     product(ZZ,Function) := (n,f) -> (
          s := 1;
          g := x -> (
               s = f x; 
               g = x -> s = s * f x);
          scan(n,x -> g x);
          s);