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Ruby Programming
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Program Termination

The method Kernel#exit terminates your program, returning a status value to the operating system. However, unlike some languages, exit doesn't just terminate the program immediately. Kernel#exit first raises a SystemExit exception, which you may catch, and then performs a number of cleanup actions, including running any registered at_exit methods and object finalizers. See the reference for Kernel#exit beginning on page 415 for details.
Ruby Programming
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