Ruby - Exception Handler Syntax

Introduction

rescue's syntax makes handling different exceptions in different ways easy:

begin 
  ... code here ... 
rescue ZeroDivisionError 
  ... code to rescue the zero division exception here ... 
rescue YourOwnException 
  ... code to rescue a different type of exception here ... 
rescue 
  ... code that rescues all other types of exception here ... 
end 

This code contains multiple rescue blocks, each of which is caused depending on the type of exception raised.

If a ZeroDivisionError is raised within the code between begin and the rescue blocks, the rescue ZeroDivisionError code is executed to handle the exception.

Related Topic

• Handling exceptions
• Using passed exceptions
• raise: Reactivate a Handled Error
• Omitting begin and end in exception handler
• Exception handler
• Handler all possible exceptions
• Handling multiple exception types
• retry: Attempt to Execute Code Again After an Error
• rescue else: Execute Code When No Error Occurs
• Ensure exception handler
• Using ensure clause to do file closing

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