BotWhile

finished = False

def do_calculation():
    print("lets " + command + " some numbers")
    input1 = input("Number 1>")
    input2 = input("Number 2>")
    number1 = int(input1)
    number2 = int(input2)
    if command == "add":
        result = number1 + number2
    elif command == "subtract":
        result = number1 - number2
    output = str(result)
    if command == "add":
        print(input1 + " + " + input2 + " = " + output)
    elif command == "subtract":
        print(input1 + " - " + input2 + " = " + output)

def do_averege():
    how_many = input("How many numbers> ")
    how_many = int(how_many)
    total = 0
    for number_count in range(how_many):
        number = input("Enter number " + str(number_count) + "> ")
        total = total + int(number)
    result = total / how_many
    print("the average = " + str(result))

def do_total():
    how_many = input("How many numbers> ")
    how_many = int(how_many)
    total = 0
    for number_count in range(how_many):
        number = input("Enter number " + str(number_count) + "> ")
        total = total + int(number)
    result = total
    print("the average = " + str(result))

print("Hi, I am Marvin, your personal bot.")

while finished == False:
    command = input("How can I help? ")
    if command == "add":
        do_calculation()
    elif command == "subtract":
        do_calculation()
    elif command == "multiply":
        do_calculation()
    elif command == "divide":
        do_calculation()
    elif command == "average":
        do_average()
    elif command == "total":
        do_total()
    elif command == "bye":
        finished = True
    else:
        print("sorry I dont understand")