{
  This is the traditional first program in most
  programming languages.  The order of business is to
  get a program to give you output.
  
  1. To "compile" this program (that is, to translate it from
     Pascal into a language the machine can understand and execute),
     type
  
  	     gpc -o hello hello.p

     This process will create a new file called "hello", which
	 is known as the "executable" version of the program (hello.p
	 is the "source code").  By typing "ls", you can see that
	 your account now has the file "hello" in it.

  2. To run the executable program, type
  
         hello

  3. What happens if you change the "writeln" to a "write" and
     recompile and rerun the program?

  4. You don't have to name the executable program the same
     thing as the source code, though it is usually a good idea
	 to do so.  Try recompiling like so:
	 
	 	gpc -o anynameyoufeellike hello.p

     Do an "ls" to make sure the new executable is in your
	 account.
	 
  5. Type "ls -l".  This gives you the long form of a listing
     of your account.  The fourth column in this listing gives you
	 the size, in bytes, of each file.  How does the size of
	 the executable program compare with the size of the source
	 code?  To save space in your account, you can remove
	 old executables using, for example, "rm hello".
}

program hello(output);

begin
	writeln( 'Hello, world.' )
end.