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The provided Python code implements a simple command-line calculator that performs basic arithmetic operations, including addition, subtraction, multiplication, and division. It defines functions for each operation and features a user-friendly interface that prompts the user to select an operation and input two numeric values. The program includes error handling for invalid inputs and division by zero, ensuring that it provides informative feedback without crashing. Additionally, it allows users to perform multiple calculations in a continuous loop until they choose to exit. This code serves as an educational tool for beginners to understand fundamental programming concepts such as functions, user input, and control flow in Python.