print("Hello! Let's get to work.")
# users_name = input("Please enter your preferred name to begin")
# print("Welcome " + users_name)
command =input("How can I help? ")
if command == "add":
    print("let's add some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 + number2
    output = str(result)
    print(input1 + " + " + input2 + " = " + output)
elif command == "subtract":
    print("let's subtract some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 - number2
    output = str(result)
    print(input1 + " - " + input2 + " = " + output)
elif command == "multiply":
    print("let's multiply some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 * number2
    output = str(result)
    print(input1 + " * " + input2 + " = " + output)
elif command == "divide":
    print("let's divide some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    if input2 == "0":
        print("Number 2 is invalid, as division by zero is undefined.")
        print("Please input a different value for Number 2")
        input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 / number2
    output = str(result)
    print(input1 + " / " + input2 + " = " + output)
elif command == "average":
    number_total = input("How many numbers do you want to average (please input a numeral)? ")
    number_total = int(number_total)
    average_list = []
    running_total = 0

    for current_number in range(number_total):
        input_number = input("Number " + str(current_number + 1) + " > ")
        average_list.append(input_number)
        running_total = running_total + int(input_number)
    output = running_total / len(average_list)

    str_total = " "
    for list_number in range(len(average_list)):
        new_str = str(average_list[list_number])
        if list_number == 0:
            str_total = str_total + new_str
        else: str_total = str_total + " + " + new_str
    print("The average of (" + str_total + " ) / " + str(len(average_list)) +  " = " + str(output))

else:
    print("I can't understand. Please only give commands to 'add', 'subtract', 'multiply', 'divide', or 'average'.")