#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
ENGG1811 Lecture Week 02 

Demonstrate local scope of variables

You can copy the code to Python tutor website to
visualise the code:
http://pythontutor.com/visualize.html 
   
"""

def my_power(x,n):
    y = x ** n
    return y
    
y = 4
z = my_power(y,2)

print('y = ',y)
print('z = ',z)