3.5

NOT: if true, return false (and vice versa)

OR: if either boolean is true, return true; else return false

AND: if both booleans are true, return true; else return false

activities = {
    "tennis": True,
    "football": False
}

# NOT
def is_not_playing(sport):
    return not activities[sport]

# OR
def is_playing_sport():
    return activities["tennis"] or activities["football"]

# AND
def has_no_time_for_homework():
    return activities["tennis"] and activities["football"]

# MAIN LOGIC

if is_not_playing("football"):
    print("you should play football!")

if is_playing_sport():
    print("great job, sports are good!")

if has_no_time_for_homework():
    print("wow, you're busy!")

you should play football!
great job, spots are good!

3.6

Selection: only run some lines of code if a certain condition is true. One example of this is an if-then statement. Algorithm: a procedure of code that does something or a task. One example is a Python function that adds a certain constant to the integer provided as input and returns the new number. Conditional statement: statement that affects whether a chunk of code will be executed or not. One example is an if-then statement.

global lights
lights = 0b00000000

# light: light number from the left
def light_place(light):
    return pow(2, 8-light)

def print_lights():
    print('{:08b}'.format(lights))

def light_toggle(light):
    global lights
    # xor flips
    lights ^= light_place(light)

def light_on(light):
    global lights
    # or always turns on
    lights |= light_place(light)

def light_off(light):
    global lights
    # anding with mask (uses not) turns off
    lights &= ~light_place(light)

## conditionals ##

def is_light_on(light):
    global lights
    return lights & light_place(light) == lights


def is_light_off(light):
    global lights
    return not is_light_on(light)

print_lights()

light_toggle(2)
print_lights()

light_on(7)
print_lights()

light_off(2)
print_lights()

print(is_light_on(7))
print(is_light_on(2))

00000000
01000000
01000010
00000010
True
False

3.7

forehand = 90
backhand = 50
serve = 75
name = input("what's ur name? ")

makes_team = True
if forehand < 70:
    if backhand > 80:
        if serve < 85:
            makes_team = False
    else:
        makes_team = False
else:
    if backhand < 85:
        makes_team = False
    elif serve < 70:
        makes_team = False

if makes_team:
    print("congrats", name, "you made it!")
else:
    print("that's tough", name, "you didn't make it!")

that's tough safin you didn't make it!

motivation = 10
teacher = "Mortensen"
code_quality = 90

give_up = False
if teacher == "Mortensen":
    give_up = True
else:
    if motivation > 60:
        give_up = False
    else:
        if code_quality < 80:
            give_up = True

if give_up:
    print("give up it's not worth it")

give up it's not worth it

number = 2
guess = int(input("guess my number! "))

if guess < number:
    print("too low")
else:
    if guess == number:
        print("just right")
    else:
        print("wayy too big")

phone = "iphone"
laptop = "macbook"
headphones = "airpods"

if phone == "iphone":
    print("nice iphone")
    if laptop == "macbook":
        print("nice macbook")
        if headphones == "airpods":
            print("nice airpods")
            print("you have 3 apple devices")
        else:
            print("you only have 2 apple devices")
    else:
        if headphones == "airpods":
            print("nice airpods")
            print("you have 2 apple devices")
        else:
            print("you only have 1 apple device")
else:
    print("you should get an iphone")

nice iphone
nice macbook
nice airpods
you have 3 apple devices

Class reccomendations

print("answer: y/n")
calculus = input("Do you like calculus?")
writing = input("Do you like writing?")
physics = input("Do you like physics?")
CS = input("Do you like CS?")
print("calculus?:", calculus)
print("writing?:", writing)
print("physics?:", physics)
print("CS?:", CS)
if calculus == "y":
    print("Take calculus 101")
    if writing == "y":
        print("Take writing 101")
    if physics == "y":
        print("Take physics 101")
    if CS == "y":
        print("Take CS 101")
elif writing == "y":
    print("Take writing 101")
    if physics == "y":
        print("Take physics 101")
    if CS == "y":
        print("Take CS 101")
elif physics == "y":
    print("Take physics 101")
    if CS == "y":
        print("Take CS 101")
else:
    print("Take CS 101")

answer: y/n
calculus?: n
writing?: y
physics?: n
CS?: y
Take writing 101
Take CS 101