Chapter 2: Variables and data types

Question 1

create a variable and print the message that assigns a function to capitalize the first letter of each word

Answer 1

name = ‘ada lovelace’

print(name.title())

Question 2

define: method in python

Answer 2

an action that python can perform on a piece of data

Question 3

print a variable as all uppercase and all lowercase

Answer 3

name = ‘ada lovelace’
print(name.upper())
print(name.lower())

Question 4

print a variable but only the first letter of the string should be uppercase

Answer 4

name = ‘ada lovelace’

print(name.capitalize())

Question 5

print a first name and last name as separate variables, then combine them to make a complete name. also, make sure the first letters are capitalized

Answer 5

first_name = ‘ada’
last_name = ‘lovelace’
full_name = f”{first_name} {last_name}”
print(full_name.title())

Question 6

what is the f in f”{first_name} {last_name}”, and what does it do?

Answer 6

the f means format. python uses the f to format the strings by replacing the variable name in the braces with the variable’s value

Question 7

print out a string using the f-string, make sure the name is capitalized

Answer 7

print(f”Hello, {full_name.title()}”)

Question 8

assign a f-string to a variable and print that variable out

Answer 8

message = f”Hello, {full_name.title()}”

print(message)

Question 9

use the format method to create what is essentially this full_name = f”{first_name} {last_name}”

Answer 9

full_name = “{} {}”.format(first_name, last_name)

Question 10

what is whitespace?

Answer 10

any nonprinting character, such as spaces, tabs, or end-of-line-symbols

Question 11

add a tab to a string you want to print

Answer 11

print(“\tpython”)

Question 12

add new lines to a string that has multiple items

Answer 12

print(“languages:\nPython\nC++\nJS”)

Question 13

combine tabs and newlines

Answer 13

print(“languages:\n\tPython\n\tC++\n\tJS”)

Question 14

print a variable that has extra whitespace on the right side and get rid of it

Answer 14

program = ‘python ‘

print(program.rstrip())

Question 15

permanently delete white space by adding rstrip() to the variable

Answer 15

program = 'python '
program = program.rstrip()

Question 16

make additional variables with extra whitespace on both sides

Answer 16

.rstrip(), .lstrip(), .strip()

Question 17

why is it better to use double quotes instead of single quotes for strings?

Answer 17

it is better to use double quotes since you can use apostrophes. in a single quote, you can’t use apostrophes since python wouldn’t know where the string ends

Question 18

add subtract, divide, and multiply integers

Answer 18

print(1+1)
print(2-1)
print(1*2)
print(15/3)

Question 19

what in python represents an exponent

Answer 19

two of * or **

Question 20

use an exponent to square several numbers

Answer 20

print(2**2)

Question 21

what is the name of any number with a decimal in python

Answer 21

a Float

Question 22

assign multiple numbers to multiple variables using a single line

Answer 22

x, y, z = 0, 0, 0

Question 23

what is a constant in python

Answer 23

a variable whose value stays the same throughout the life of the program

Question 24

how is a constant written

Answer 24

all caps, MAX_CONNECTIONS = 5000

Question 25

Use a variable to represent your favorite number. Then, using using another variable, create a message that reveals your favorite number. Print that message.

Answer 25

fav_num = 42
msg = f"My favorite number is {fav_num}."

print(msg)