what is a function used for in python code example

Example 1: python function

def name():#name of the def(function);
  print("Hallo, World!")#Output is Hallo, World!;
  
name()#Name of the def, the programm will jump to the def;

#output:
#Hallo, World!

Example 2: functions in python

# Functions

""" All the functions are followed by the 'def' keyword in python"""

def Greet(User): # The arguments inside the brackets should be called or the function gives you an error
  print("Hello" + User + "!")
  
# Calling the function

Greet("Shivram")

# Output: 'Hello Shivram !'