why use functions 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: how to define functions in python

def add(number):
  equation = 5 + number
  print(equation)
  
 
add(10)

output:
  
  15