2.3.13

Exceptions

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Exceptions

Rather than leaving the program to crash when an error occurs, exceptions give us a chance to handle the error more gracefully.

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Exceptions

  • When an error arises in a program, the program is said to 'throw' an exception.
  • An exception is a description of the error that arose.
  • Exceptions can be 'caught' or handled rather than allowing the program to crash.
Illustrative background for Handling exceptionsIllustrative background for Handling exceptions ?? "content

Handling exceptions

  • If an exception can be dealt with internally, then we can catch the exception and continue with the program.
  • This is done using a structure as below:
    • try: ---
    • except: ---
  • The code within the try block will be executed.
    • If an exception is thrown inside the try block, then the except block will be run to 'clean up' after the exception.

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