Hello world programs show us how to communicate with the outside world from inside our programs. Let’s look at this in more detail. Saving our programs in files is how we begin to build more sophisticated programs. Once our code is saved, we will interact with the program opposed to the code and data directly, and this will make log messages like hello world necessary for to know what our programs are doing.

1) Save our programs so we can run them at a later time.
2) Group our code into files to create distinct programs.
3) PowerShell, JavaScript, LinuxTerminal (Bash)

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