3.1.1

name = "alex"
age = 16
traits = {
    "stupid": True
}

print(name, age, traits)

alex 16 {'stupid': True}

3.1.2

Assignment operator: assigns a value to a variable Collegeboard pseudocode assigment operator: <- X value: if the value of the x variable is changed, the print builtin would display the new value of x Multiple ways to define a variable in JS:

// works but dont do this, pollutes global scope
a = 1
var a = 1

// reccomended
let a = 1
// prevents reassignment
const a = 1

3.2.1

List: a collection of data values stored sequentially Element: a single data value within a list Reference elements in a list/string: using an index like so--data[0] Example of a string: "hello world!"

foods = ["ramen", "pasta", "sushi", "donuts"]
# index 3
print(foods[3])
# position 3
print(foods[2])
# negative index (last position)
print(foods[-1])

donuts
sushi
donuts

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
numlist = [int(n) for n in [num1, num2, num3]]
print("Original numbers:",numlist)
print("Adding:",add)



# The following is the code that adds the inputted addend to the other numbers. It is hidden from the user.
for i in range(len(numlist)):
    numlist[i-1] += int(add)

print("New numbers:",numlist)

Original numbers: [100, 200, 300]
Adding: 25
New numbers: [125, 225, 325]

3.2.3

Python quiz: Simplify list:

Why are lists better for code? They are more concise and allow you to change entries in a specific location rather than changing individual lines by hand. Long way:

one = 1
two = 2
three = 3
four = 4

print(one + two)
print(two + three)
print(three + four)

Short way:

nums = [1, 2, 3, 4]
for i in range(len(nums)-1):
    print(nums[i]+nums[i+1])