python exit program if condition
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Title: Python Tutorial: Exiting a Program Based on a Condition
Introduction:
In Python, it is common to exit a program based on certain conditions to control the flow of execution. This tutorial will guide you through the process of using the sys.exit() function to gracefully exit a Python program when a specific condition is met.
The sys.exit() function is part of the sys module and is used to exit a Python program. It raises the SystemExit exception, which can be caught and handled if necessary.
In this example, the program prompts the user to enter a number. If the user enters a negative number, the program prints an error message, exits with a status code of 1, and terminates gracefully. If a non-negative number is entered, the program proceeds to perform a calculation.
Save the code in a file, for example, exit_example.py, and run it using a Python interpreter:
Using sys.exit() allows you to exit a Python program based on specific conditions. This can be useful for handling errors, enforcing constraints, or terminating the program when necessary. Remember to choose an appropriate exit status code to indicate the reason for the program termination.
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