Running Sum, Product, and Average Program

Program 3: “Running Sum, Product, and Average of Numbers” Create a program that allows a user to input individual numbers until a sentinel is entered. After the user has entered each number, the program prints the sum, product and average of all the numbers, and a message stating whether each is odd, even, or zero. The functionality must be accomplished using loop(s) and ifs, and include the following:

1. An appropriately named function that: a. calls the program header you created as program #2 above b. collects numerical inputs from the user until a sentinel is entered c. checks to ensure the input is numeric and returns an error message if it is not d. keeps track of the number of values entered by the user e. calls the sum, product, and average functions passing them the correct arguments.

• Note the sum, product, and average are for all the numbers entered at that point and so are “running” statistics..

2. A custom function that is passed 2 numeric arguments and returns their sum. Do not name this function “sum,” but instead something like “mySum.”
3. A custom function that is passed 2 numeric arguments and returns their product.
4. A custom function that is passed both a sum and a count and returns the average. Do not name this function “average,” but instead something like “myAvg.” a. * This needs to include a check to ensure the denominator is not zero. If the denominator is 0, it returns 0.
5. A function that is passed four arguments for the number of values entered so far, their sum, product, and average, and prints them out in an appropriate statement. Make a reasonable print out, indented, like “The sum is 5 and is odd.” Similarly for the product and average, each on its own line.

Here's a Python program that meets the requirements you've outlined. The program collects numerical inputs from the user until a sentinel value is entered, calculates the running sum, product, and average, and provides information about whether each of these values is odd, even, or zero.

def program_header():
    print("Welcome to the Running Sum, Product, and Average Program!")
    print("You can enter numbers continuously until you enter 'exit' to stop.")

def mySum(a, b):
    return a + b

def myProduct(a, b):
    return a * b

def myAvg(total, count):
    if count == 0:
        return 0
    return total / count

def print_statistics(count, total_sum, total_product, average):
    sum_status = "even" if total_sum % 2 == 0 else "odd" if total_sum != 0 else "zero"
    product_status = "even" if total_product % 2 == 0 else "odd" if total_product != 0 else "zero"
    avg_status = "even" if average % 2 == 0 else "odd" if average != 0 else "zero"
    
    print(f"  The sum is {total_sum} and is {sum_status}.")
    print(f"  The product is {total_product} and is {product_status}.")
    print(f"  The average is {average} and is {avg_status}.")

def main():
    program_header()
    
    total_sum = 0
    total_product = 1
    count = 0
    
    while True:
        user_input = input("Enter a number (or 'exit' to finish): ")
        
        if user_input.lower() == 'exit':
            break
        
        try:
            number = float(user_input)
        except ValueError:
            print("Error: Please enter a valid number.")
            continue
        
        total_sum = mySum(total_sum, number)
        total_product = myProduct(total_product, number)
        count += 1
        
        if count > 0:
            average = myAvg(total_sum, count)
        else:
            average = 0
        
        print_statistics(count, total_sum, total_product, average)

if __name__ == "__main__":
    main()

Explanation of the Code:

1. Program Header: The program_header function prints a welcome message to the user.

2. Custom Functions:

   • mySum(a, b): Returns the sum of two numbers.
   • myProduct(a, b): Returns the product of two numbers.
   • myAvg(total, count): Returns the average of the total sum divided by the count, with a check to avoid division by zero.

3. Statistics Printing: The print_statistics function takes the count, total sum, total product, and average, and prints them along with whether they are odd, even, or zero.

4. Main Function:

   • Initializes the total sum, total product, and count.
   • Continuously prompts the user for input until 'exit' is entered.
   • Validates the input to ensure it's numeric.
   • Updates the total sum, product, and count, and calculates the average.
   • Calls the print_statistics function to display the results.

Usage:

Run the program, enter numbers, and when you're done, type 'exit' to see the final statistics. The program will handle invalid inputs gracefully and provide feedback.