__all__ = ['']


def add_numbers(num1, num2):
    print(num1 + num2) 

def substract_numbers(num1, num2):
    print(num1 - num2)

def multiply_numbers(num1, num2):
    print(num1 * num2)

def divide_numbers(num1, num2):
    print(num1 / num2)

def print_number(num="Error: No number was given"):
    print(num)

def average_numbers(num1, num2):
    print( (num1 + num2) / 2)