How do I set a text variable The new text is added with the old

Hi guys

I have a duplicate and a new text is being generated, how do I add the new to the old?

for n=1:10

ss = n + 'ss';

end

dlmwrite(sprintf(All.txt', n), ss;

Answer 1

[Atsushi Ueno]

> how do I add the new to the old?

ss = [];
for n=1:10
    ss = [ss, num2str(n), 'ss'];
end
ss

ss = '1ss2ss3ss4ss5ss6ss7ss8ss9ss10ss'

[Ayman saleh]

Thank you