def my_func():
    print("I am a function")



def add_numbers():
    number_1 = 10
    number_2 = 20
    number_3 = number_1 + number_2
    print(number_3)

my_func()  #<---- this is how we call function or print them out kind of    
add_numbers()
add_numbers()
add_numbers()
add_numbers()
add_numbers()
add_numbers()
my_func()