Calculating the sum of this array

Hello, can anyone please tell me how i can calculate the sum of this array:

l(k).populacao=populacao;

when i run the program it looks like this:

ans = { populacao =

(,
  [1] =

18000

    [2] =

20000

    [3] =

16000

    [4] =

11000

    [5] =

19000

,)

thanks

[Walter Roberson]

Is that a table produced by the symbolic toolbox ?

Answer 1

[Andrei Bobrov]

eg

l = struct('populacao',{18000;20000;16000;11000;1900});
out = sum([l.populacao]);

[Walter Roberson]

The "[1] =" and so on looks a lot like tables in the symbolic toolbox to me.

I think the input form is a given for this problem. But we need explanation from the original poster.