Which feature allows a script to handle unexpected issues without crashing?

The feature that allows a script to handle unexpected issues without crashing is error handling. This involves coding techniques that enable a script to anticipate potential errors and provide a way to manage them when they arise. By implementing error handling mechanisms, a script can redirect the program's flow instead of allowing it to terminate unexpectedly. This includes using constructs like try-catch blocks, which allow the script to attempt a section of code and catch exceptions that may occur, thereby preventing a complete script failure.

Error handling is essential for creating robust scripts that can run in diverse environments and deal with unforeseen circumstances, such as invalid user input, unavailable resources, or network issues. When a script employs error handling effectively, it can either recover from the error or provide meaningful output to the user, enhancing the overall user experience and reducing downtime.