ruby_exceptions.pdf

This document discusses exception handling in Ruby. It begins by explaining why exception handling is needed by describing errors, error codes, and their shortcomings. It then discusses Ruby's exception handling mechanisms, including the Exception class hierarchy, user-defined exceptions, and how to handle, raise, and catch/throw exceptions. Key aspects covered are the rescue and ensure blocks for handling exceptions, and the raise statement for deliberately raising exceptions. The document concludes that exception handling is essential for object-oriented programming.