a = (11:20); % a vector with 10 Elements
fprintf('length of a: %i\n', length(a))
size_of_a = size(a); % get the size and store it in a new variable

% size_of_a is a vector itself
fprintf('number of dimensions (rank) of size_of_a: %i\n', length(size_of_a))

% get the value of the second element of size_of_a
fprintf('number of entries in the 2nd dimesion of a: %i\n', size_of_a(2))