MATLAB: How can i correct the below Matlab code

Question

for p=1:5

S0=[0.1 0.2 0.3 0.4 0.5];

D0=[2.1 2.2 2.3 2.4 2.5];

for rep1=length(S0(p))

for rep2=length(D0(p));

Sr=S0(rep1);

Du=D0(rep2);

end

end

I need to evaluate the below condition. How can i change the above code.

S0 1st value & D0 1st value;

S0 2nd value & D0 2nd value;

S0 3rd value & D0 3rd value;

S0 4th value & D0 4th value;

S0 5th value & D0 5th value.

Answer 1

S0 = [0.1,0.2,0.3,0.4,0.5];
D0 = [2.1,2.2,2.3,2.4,2.5];
for k = 1:numel(S0)
    Sr = S0(k);
    Du = D0(k);
    ... the rest of your code
end