# Function : It is a block oof organised , reusable code that is used to perform a single, related action . Functionn provide better modularity.
a = 6
b = 9
c = sum((a,b)) # sum is an built-in function , click control + sum(by mouse) to know about it.
print(c)

# User defined function.
def akash()  :
    print("Akash studied in class 11")
    print("Akash likes games like PUBG")
akash()         # It is also an function( User defined function ) that was cteated by me.

def func(x ,y) :
    z = x+y
    o = x*y
    print("The sum of x & y is :", z ,"and x * y is :", o )
func(5 , 225)

def avr(a,b):
    """This is a function which calculate average of two numbers and these  function does't work for three numbers.
     It is known as docstring'"""
    average = (a+b)/2
#   print("Average is:", average)
    return 'Average is :', average

v =  avr(10,40)
print(v)
print(avr.__doc__)  # __doc__ is used for printing docstring