How can I increment different values for every iteration to a for loop?

Hi! I'm at stall of my program because of this. I would like to increment different values for every iteration in a for loop but sad to say I can't find a solution. BTW, I'm still a newbie. Here is an example:

a = [1 3 4 7 8 10 14 17 21 26];

for k=a(1):X:a(end)                   %X is the increment
    disp(k)                           %displays k
end

I need to obtain 10 iterations that displays k which is the values of a. Hope you can help me.

Answer 1

[Robert Cumming]

 for k=1:length (a)
  disp ( a(k) );
 end

[Marc Edwin Montilla]

It works! Thanks Sir!

Answer 2

[fengwuxiaoli]

a = [1 3 4 7 8 10 14 17 21 26]; for k=a disp(k); end