I want to create registraion codes randomly.
How can I generate such a registration code containing numbers and characters. An example of how the registration code should look like is the registraion code when installing windows: AX54G-55BZD-IJQW9-BZU41 (or sth. like that).
The code will be stored in a database und must be unique.
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Introduction and definition:
Declare an array and cover the syntax of declaring them:
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