#!/usr/bin/python
# every function has return value.
# if your function is not having a return value - you get None.
# if you have a return value , you return the value outside the function.
# return is not a print statement.
# return marks the end of the function.
# 

def my_func():
	return "hello world!!"
	print "first line"
	print "second line"
	print "third line"

print my_func()  # calling a function