1+ # Define a function to add two numbers
12def add(x, y):
23 """Function to add two numbers"""
34 return x + y
45
6+ # Define a function to subtract two numbers
57def subtract(x, y):
68 """Function to subtract two numbers"""
79 return x - y
810
11+ # Define a function to multiply two numbers
912def multiply(x, y):
1013 """Function to multiply two numbers"""
1114 return x * y
1215
16+ # Define a function to divide two numbers
1317def divide(x, y):
1418 """Function to divide two numbers"""
19+ # Check if the second number is not zero to avoid division by zero error
1520 if y != 0:
1621 return x / y
1722 else:
23+ # Return an error message if the second number is zero
1824 return "Error: Cannot divide by zero"
1925
26+ # Define the main function that serves as the entry point of the program
2027def main():
28+ # Display the title of the program
2129 print("Simple Calculator")
30+ # Display the available mathematical operations
2231 print("Available operations:")
2332 print("1. Add")
2433 print("2. Subtract")
2534 print("3. Multiply")
2635 print("4. Divide")
2736
37+ # Prompt the user to select an operation
2838 choice = input("Enter your choice (1/2/3/4): ")
2939
40+ # Prompt the user to enter the first number
3041 num1 = float(input("Enter the first number: "))
42+ # Prompt the user to enter the second number
3143 num2 = float(input("Enter the second number: "))
3244
45+ # Perform the selected operation and display the result
3346 if choice == '1':
3447 print(f"Result: {num1} + {num2} = {add(num1, num2)}")
3548 elif choice == '2':
@@ -39,7 +52,10 @@ def main():
3952 elif choice == '4':
4053 print(f"Result: {num1} / {num2} = {divide(num1, num2)}")
4154 else:
55+ # Inform the user if an invalid choice was made
4256 print("Invalid choice. Please select a valid operation (1/2/3/4).")
4357
58+ # Check if the script is being run directly and not imported
4459if __name__ == "__main__":
60+ # If the script is run directly, call the main function to start the calculator
4561 main()
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