'''lecture_09_distance_template.py
Illustrates how return statements work
Oliver W. Layton
CS 151: Computational Thinking: Visual Media
Spring 2021
TODO:
1. Add return statement
2. Demo None: show what happens with assignment without return value
3. Simultaneous assignment: show returning absolute and Eucludean distance
4. Try adding int and tuple
'''
import math


def distance(x, y):
    '''Computes the Euclidean distance between x and y'''
    dist = math.sqrt(x**2 + y**2) # 5
    # return dist # return 5
    # return math.sqrt(x**2 + y**2) # return 5
    # return


# main code
# dist = 0
x = 3
y = 4
# distance(x, y) # 5
# 5
# dist = distance(x, y) # 5
# This is like: dist = 5
z = distance(x, y) #  z = 5
# print(dist)
print(z)

if z is None:
    print('We have a None!')
else:
    print('We have a distance value!')