How to save outputs in a while loop

I would like to save each output of the following while loop, however I do not know how to do this.

while i<a
    i=1+i;
    E=members(i,4);
    A=members(i,5);
    start=members(i,2); %the starting joint of the member
    last=members(i,3); %The end joint of the member
    Xb=joints(start,2); %Beginign x coordinate
    Xe=joints(last,2); %Ending x coordinate
    Yb=joints(start,3); %Begingin y cooridnate
    Ye=joints(last,3); %Ending y coordinate
    [K,T]=stiff_truss(E,A,Xb,Yb,Xe,Ye); %Creates the K,T for each member

end

Answer 1

[KSSV]

Say you want to store K,T inside the loop. Do as follows:

iwant = cell(a,2) ;
while i<a
  i=1+i;
  E=members(i,4);
  A=members(i,5);
  start=members(i,2); %the starting joint of the member
  last=members(i,3); %The end joint of the member
  Xb=joints(start,2); %Beginign x coordinate
  Xe=joints(last,2); %Ending x coordinate
  Yb=joints(start,3); %Begingin y cooridnate
  Ye=joints(last,3); %Ending y coordinate
  [K,T]=stiff_truss(E,A,Xb,Yb,Xe,Ye); %Creates the K,T for each member
  iwant{i,1} = K ;
  iwant{i,2} = T ;
end

[Krasho4]

I added the new code into and I received an error message saying sub-scripted assignment dimension mismatch. It specified the line iwant(i,:)=[K,T];

[KSSV]

Ohh...then K and T is a matrix? Edited my answer, considering K and T as a matrix.