What happens if an exception is not handled in Python?

When an exception is not handled in Python, the program crashes and terminates, leading to an abrupt stop in its execution. In Python, exceptions are unexpected errors that occur during the execution of a program, and if these exceptions are not addressed by the programmer through error handling mechanisms, such as try-except blocks, the interpreter will raise an unhandled exception.

When this occurs, Python outputs a traceback message that indicates the type of error and the line number where it happened, ultimately stopping the program from continuing to run. This behavior serves as a critical signal to developers to debug the program and address the underlying issue causing the exception.

Understanding how exceptions work and the implications of leaving them unhandled is essential for writing robust and error-resistant code.