Here’s how you can write “Hello World!” in the REXX programming language. Open a new script file and save it with the “.rex” extension (e.g., hello_world.rex). Then, add the following code inside the script:
do; say 'Hello World!'; end
Save and close the file. To execute this script, launch your REXX interpreter (REXX on IBM AIX, for example) and type the absolute or relative path to your script file, followed by a space and a semicolon (e.g., “C:\path\to\hello_world.rex;” without quotes). This will execute the script and print “Hello World!” to the screen. Remember to close your REXX interpreter when you’re done.
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