how does def work in python code example

Example 1: how to make a function in python

def test_function(argument1,argument2,argument3) :
  # Do something with the code, and the arguments.
  print(argument1)
  print(argument2)
  print(argument3)
  
# Calling the function.

test_function('Hello','World','!')

# Output
'''
Hello
World
!
'''

Example 2: how to make a function in python

def your_function(arg1, arg2, arg3):
  do_something
  do_something_else

#to call the function (make it run):

your_function(something, something, something)