#!/usr/bin/env python
# coding: utf-8

# In[4]:


# Section 5.2 -- Defining and calling void functions
#
# Functions have names -- rules are the same as for variables
#
# Often -- use a verb for a function name (not required)
#
#
# Syntax
# def funct_name():
#     statements
#     statements
#     etc
#
# 
#Example 
def message():
    print("Hello!")
    print("World!!")
message()
#
# Updated syntax
# def funct_name(var):
#    stuff
#    stuff
#    stuff
def square(x):
    print(x**2)
square(4)