total_saving = 0;

% iterate through all the 52 weeks in a year
for week=1:52
  % rand() returns a random number between [0.0 .. 1.0]
  % multiply it with 25 to have [0.0 .. 25.0] range
  saving_this_week = rand() * 25;
  % accumulate the saving so far
  total_saving = total_saving + saving_this_week;
end

disp(total_saving);