Hacks Unit 3.1.1

name = "Grace"
#Uses an integer
grade = 11
#Uses a list
classes = ["APUSH", "APEL", "CSP", "AP Calculus"]

print(f"Hi, my name is {name}. I am in {grade}th grade.")
print("I am taking the classes")
print(*classes, sep = ", ")

Hi, my name is Grace. I am in 11th grade.
I am taking the classes
APUSH, APEL, CSP, AP Calculus

Hacks Unit 3.1.2

an assignment operator is a symbol that assigns a value to a variable
in College Board, the assignment variable is ->
A variable, x, is initially given a value of 15. Later on, the value for x is changed to 22. If you print x, would the command display 15 or 22? Answer: 22

Hacks Unit 3.2.1

a list is a sequence of finite strings that surrounded by square brackets and separated by commas
an element is the individual strings in a list
the easiest way to reference an element is to index the list or string, which is done by list[0]
an example of a string is "hello world"

foods = ["pizza", "watermelon", "sushi", "fried chicken"]

#index each element in the list
for i in range(len(foods)):
    print(foods[i])

pizza
watermelon
sushi
fried chicken

Hacks 3.2.2

num1 = input("Input a number. ")
num2 = input("Input a number. ")
num3 = input("Input a number. ")
add = input("How much would you like to add? ")

# Add code in the space below
num1 = int(num1)
num2 = int(num2)
num3 = int(num3)

numlist = [num1, num2, num3]

# The following is the code that adds the inputted addend to the other numbers. It is hidden from the user.

for i in numlist:
    numlist[i-1] += int(add)

print(numlist)

[7, 8, 9]

Hacks 3.2.3

import getpass, sys

def question_with_response(prompt):
    print("Question: " + prompt)
    msg = input()
    return msg

questions = 4
correct = 0

print('Hello, ' + getpass.getuser() + " running " + sys.executable)
print("You will be asked " + str(questions) + " questions.")
question_with_response("Are you ready to take a test?")

rsp = question_with_response("The purpose of lists and dictionaries are to manage the ____ of a program")
if rsp == "complexity":
    print(rsp + " is correct!")
    correct += 1
else:
    print(rsp + " is incorrect!")

rsp = question_with_response("Lists are a form of data ______")
if rsp == "abstraction":
    print(rsp + " is correct!")
    correct += 1
else:
    print(rsp + " is incorrect!")

rsp = question_with_response("Which brackets are used to assign values to a variable to make a list?")
if rsp == "[]":
    print(rsp + " is correct!")
    correct += 1
else:
    print(rsp + " is incorrect!") 

print(getpass.getuser() + " you scored " + str(correct) +"/" + str(questions))

Hello, gracewang running /opt/homebrew/opt/python@3.10/bin/python3.10
You will be asked 4 questions.
Question: Are you ready to take a test?
Question: The purpose of lists and dictionaries are to manage the ____ of a program
complexity is correct!
Question: Lists are a form of data ______
abstraction is correct!
Question: Which brackets are used to assign values to a variable to make a list?
[] is correct!
gracewang you scored 3/4

foods = ["pizza", "hot dog", "sushi", "strawberry", "sandwich"]
print(*foods, sep=" ")

pizza hot dog sushi strawberry sandwich

lists are better to use than strings in some cases because it reduces clutter, for example, if you wanted to print all the items in a list, typing the previous example out would require 6 lines while the simplified line only requires 2

class1 = "CSP"
class2 = "APEL"
class3 = "APUSH"
class4 = "AP Calc BC"
class5 = "AP Physics"
print(class1, class2, class3, class4, class5)

#short way
classes = ["CSP", "APEL", "APUSH", "AP Calc BC", "AP Physics"]
print(*classes, sep=" ")

CSP APEL APUSH AP Calc BC AP Physics
CSP APEL APUSH AP Calc BC AP Physics

Notes

Must Knows:

Variable: abstraction inside a program that holds a value, where each variable has associated data storage that represents a single value at a time
- typically have meaningful names that helps with the overall organization of the code and understanding of what is being represented by the variables
there are a variety of methods to represent data, called data types, which are referenced using variables
- Booleans
- integers
- lists
- strings
Collegeboard uses <– as the assignment operator (useful for MC)
- this is = in Python

s = "string"
integer = 5
boolean = True

list = ["banana", "strawberry", "apples"]
#index list

print("The command List[1] prints: " + list[1])
print("The command List[-1] prints: " + list[-1])

The command List[1] prints: strawberry
The command List[-1] prints: apples