how do you use def in python code example

Example 1: how to define function in python

def example():			#This defines it
  print("Example.")		#This is the defined commands

example()				#And this is the commands being run

Example 2: python funtion

def nameOfFunction(something):
  	return something

Example 3: explain def in python

def greet(name):
    """
    This function greets to
    the person passed in as
    a parameter
    """
    print("Hello, " + name + ". Good morning!")