Display message in Command Window, not using a pop-up message box

I like to use the input function very much. And I also like to give some instruction to other people who use my code, on what to input, in the command window, but not in a pop-up message box. After a little googling, I found the disp function.

clc;
clear all;
tic;
disp ('Hello, World!');
h=waitbar(0,'Please wait..');
n=0;
for i=1:100
    waitbar(i/100)
    for j=1:100
        for k=0:100;
            n=factorial(2);
        end
    end
end
close(h)
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