write a python program take 2 num from the user and print their sum pass all the test cases

To create a Python program that takes two numbers from the user and prints their sum, we will leverage the built-in input() function to capture user input, convert that input into integers (or floats, based on your requirement), and then compute the sum. Below is a complete program along with example test cases to ensure functionality.

Complete Python Program

# Function to add two numbers
def add_two_numbers(num1, num2):
    return num1 + num2

# Main function to execute the program
def main():
    try:
        # Taking input from the user
        number1 = float(input("Enter the first number: "))  # Using float for broader number types
        number2 = float(input("Enter the second number: "))
        
        # Calculating the sum
        result = add_two_numbers(number1, number2)
        
        # Printing the sum
        print(f"The sum of {number1} and {number2} is: {result}")
        
    except ValueError:
        print("Please enter valid numbers.")

# Calling the main function
if __name__ == "__main__":
    main()

Explanation of the Code

1. Function Definition:

   • The function add_two_numbers(num1, num2) takes two parameters and returns their sum.

2. User Input:

   • The main() function prompts the user to enter two numbers. We use float(input()) to ensure that both integer and decimal inputs are valid.

3. Error Handling:

   • A try-except block catches any ValueError exceptions, which might occur if the user enters non-numeric values.

4. Output:

   • Finally, the program prints the results in a user-friendly format.

Test Cases

To validate the functionality of the program, you can run the following test cases:

1. Test Case 1:

   • Input: 3 and 5
   • Output: The sum of 3.0 and 5.0 is: 8.0

2. Test Case 2:

   • Input: -2.5 and 1.5
   • Output: The sum of -2.5 and 1.5 is: -1.0

3. Test Case 3:

   • Input: 0 and 0
   • Output: The sum of 0.0 and 0.0 is: 0.0

4. Test Case 4 (invalid input):

   • Input: abc and 2
   • Output: Please enter valid numbers.

Conclusion

This program efficiently captures user input, performs a basic arithmetic operation, and handles errors gracefully. By running the suggested test cases, you can confirm that the program behaves as expected under various scenarios. Feel free to modify the prompt messages or the data types as per your specific requirements.