Challenge Title: Simple Calculator

Description: Create a simple calculator that can perform basic arithmetic operations: addition, subtraction, multiplication, and division.

Requirements:

• Programming Language: Python
• Difficulty Level: Easy
• Topics to Cover: Functions, Input/Output, Conditional Statements
• Constraints:
  • The program should prompt the user to enter two numbers and the operation they wish to perform.
  • The program should handle division by zero gracefully by displaying an appropriate message.
  • The calculator should loop, allowing the user to perform multiple calculations until they choose to exit.

Special Instructions: Ensure that the code is well-commented to explain the logic behind each part of the program.