explain def in python

1def example():			#This defines it
2  print("Example.")		#This is the defined commands
3
4example()				#And this is the commands being run

1def add(number):
2  equation = 5 + number
3  print(equation)
4  
5 
6add(10)
7
8output:
9  
10  15
11  

1def greet(name):
2    """
3    This function greets to
4    the person passed in as
5    a parameter
6    """
7    print("Hello, " + name + ". Good morning!")