To be absolutely clear about what happens here ... when a variable “goes out of scope” in this way, the data which it formerly referred to (probably) becomes unreferenced, and therefore eligible for eventual cleanup by Perl’s “garbage collector.” Conceptually, every memory object has a reference-count and becomes eligible for cleanup when that count becomes zero. Garbage collection happens opportunistically, since of course it does represent time-consuming overhead, but it means that you don’t have to worry about explicitly reclaiming memory. All interpreted languages and many compiled ones offer a similar feature.
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