Hello World application


This example is really very simple indeed (also available as a plain ASCII file):

  /* This is a fully documented NetRexx program */
  say 'Hello World!'

The first line is a comment, which isn't really needed. The second line is a NetRexx instruction called SAY, which takes an expression (here just a constant string) and displays it.

To run the program, you'd create a plain text file containing the two lines above (or just the second line), and then enter the command:

  netrexxc -run hello

This would:

  1. Call the NetRexx translator to translate the program from NetRexx to Java
  2. Call the Java compiler (javac) to compile the program into a class file
  3. Call the Java interpreter (java) to interpret the class file, which should then display "Hello World!".

Note that the Java runtime (e.g., from the Java Development Kit) must be installed.


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