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This lesson covers exception handling for the OCR A-Level Computer Science (H446) specification. Exception handling allows programs to detect and respond to runtime errors gracefully, rather than crashing unexpectedly.
An exception is a runtime event that disrupts the normal flow of program execution. Exceptions occur when something goes wrong during execution -- for example, dividing by zero, accessing a missing file, or providing invalid input.
| Term | Definition |
|---|---|
| Exception | A runtime error that disrupts normal program flow. |
| Throwing/raising | Creating an exception to signal an error. |
| Catching/handling | Detecting an exception and executing recovery code. |
| Stack trace | The sequence of function calls that led to the exception. |
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