What is shared variables with threads::shared in Perl?

Shared variables in Perl are used to enable multiple threads to access and modify the same variable simultaneously. The threads::shared module allows for the creation and management of these shared variables, making inter-thread communication easier. This is particularly useful in multithreaded applications where data consistency is crucial.

To use shared variables, you need to declare them with the share() function provided by the threads::shared module. Once a variable is shared, it can be accessed by different threads without the need for complex locking mechanisms, although proper synchronization should still be considered to avoid race conditions.