HELLO, a MATLAB program which says "Hello, world!".
If you're just trying to learn MATLAB, or learning how to use MATLAB on a different computer system, or in batch mode, it's helpful if you start with a very simple program with a tiny amount of output that should print immediately if things are working well.
One issue that MATLAB users need to resolve on a new system is making sure that the M-file containing their program is "visible" to MATLAB. As far as the HELLO program goes, this means that you want to be able to type "hello" and have MATLAB know that it should find the file "hello.m" and run it. You can either do this by using the cd command inside of MATLAB to move the current directory to the directory containing hello.m, or you can try to add that directory to MATLAB's path. The second option can be done by going to MATLAB's FILE menu, choosing "Set Path..." and the on the new menu choosing "Add directory..." which will put you into an interactive browser that will let you find and identify the directory where your command file is.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
HELLO is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.