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

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

Synopsis:

Function: sum -- compute the sum

Input:

an instance of class ZZ.

an instance of class Function.

sum(n,f) -- compute the sum f(0) + f(1) + ... + f(n-1).

i1 : sum(10, i -> i^2)



o1 = 285

See also:

sum -- compute the sum

Code:

     -- ../../../Macaulay2/m2/lists.m2:59-65
     sum(ZZ,Function) := (n,f) -> (
          s := 0;
          g := x -> (
               s = f x; 
               g = x -> s = s + f x);
          scan(n,x -> g x);
          s);