""" Purpose: demonstrate assignment only effects the variable being assigned
"""

# y = x # what is x? i havent seen x yet. ERROR: You can't use a variable before it is defined!
x = 10 # variable x is assigned value 10
y = x # variable y is assigned the value of variable x
y = x + y # we can do this because x and y already exist. this is updating the value of y to include a
# previous value of y, then adding x. Little complicated, so we'll come back to this another day
x = 20 # variable x is assigned value 20. this overwrites the previous assignment
x = "Charles" # variables can hold different types of values (strings, integers, decimal numbers, etc)
# snake_case: The way we stylistically name variables in python. We use all lowercase letters,
# and replace spaces with underscores (_). EX: this_is_snake_case
# Charles needs to be surrounded by quotes during assignment if we want the string "Charles".
# without the quotes, python will think we have a variable named Charles
# line 9 is assigning the variable the value of the string "Charles"
# anything between quotes "" is a literal string. You can put any characters between the quotes

# having readable code makes it easier for us to give you partial credit (:
# pro tip: BE COMFY WITH INFO SHEET AND MODULE TAB. you can use it on exams

# use comments to make your code more readable. comment tricky/complicated things, or leave comments
# if you're attempting to do something but cant figure it out. No need for excessive amounts of comments

print( "x:", x ) # x was most recently assigned to 20, so the value is 20
print( "y:", y ) # y was given the value of x when x's value was still 10. changing the value of x
# later wont effect the value of y

# using the string "x:" and then the variable x lets us label out output.
# print( "x:" ) will literally print out x:, then print( x ) will print the value of the variable x
# we can combine these print statements like: print( "x:", x ), where the comma separates the things
# we print. (and in the output, python will put a space between the string "x:" and the value of x)
# running your code will save it