Dart Errors and Exceptions - Exceptions (try-catch-finally blocks) and create own Exception class

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You explain so well! Thank you for this series! I had a problem and wanted to check for a solution and I ended up watching all of this series.

damilolajohn
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Im trying to understand what implementing the exception class to our own custom exception class serves. What happens if we don't implement the main Exception superclass? will the 'on' keyword not catch it although we throw it?

brightsecrets