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 Hello World   Modula-2   Michael Neumann 
(* Hello World! *)

MODULE HelloWorld;

FROM InOut IMPORT WriteString, WriteLn;

BEGIN
   WriteString('Hello World');
   WriteLn;
END HelloWorld.
Prints "Hello World" onto the screen.


 Hello World   Modula-3   Michael Neumann 
(* Hello World! *)

MODULE HelloWorld EXPORTS Main;

IMPORT SIO;

BEGIN
   SIO.PutText("Hello World\n");
END HelloWorld.
Prints "Hello World" onto the screen.


 Squares   Modula-3   Michael Neumann 
MODULE Squares EXPORTS Main;

IMPORT SIO;

BEGIN
   FOR i:=1 TO 10 DO
      SIO.PutInt(i*i);
      SIO.PutText(" ");
   END;
END Squares.
Outputs the squares from 1 to 10.