what does <function f at 0x00C15660>mean looks like its throwing excempt,plz help

Question

x=5
y=5
if x==y:
print ("they r equal")
else:
print("they r not")

a = int(input("enter 1st number 'a' "))
print (" entered number is",(a))
b = int(input("enter 2nd number 'b'"))
print (" entered number is",(b))
def f(a,b):
(a**2)+(b**2)+(2*a*b)
print(" sq of (a+b) is",(f))

<<<This was the code >>>

they r equal
enter 1st number 'a' entered number is 5
64
enter 2nd number 'b' entered number is 64634
sq of (a+b) is <function f at 0x00C15660>
<<< this was the output>>>

plz explain what is trying to communicate to me ....?
and why is not the function printed....?
what change has to be made to the code.....?

Answer 1

change
print(" sq of (a+b) is",(f))
to
print(" sq of (a+b) is",(f(a, b))

this happened because you did not invoke the f function, but simply printed it

also, add return just before (a**2)+.... that is inside the f function, otherwise nothing will be returned and the result will be None as no value was returned from f

f should look like this:
def f(a,b):
return (a**2)+(b**2)+(2*a*b)

Answer 2

f(a,b) is a function taking two arguments.
so you need to call it by writing
print(" sq of (a+b) is",f(a,b))
in the print statement