Midterm review

Question 1

Variables

Answer 1

a bucket to store information in

ex) camelCase or snake_case

Question 2

Integers

Answer 2

int

3 or -1 or 0 or 2001

Question 3

Real Numbers

Answer 3

float

3.14 or 0.094 or -12.0

Question 4

Character Strings

Answer 4

str

“Hi” “ “ “a” “44”

Question 5

Boolean

Answer 5

bool

True or False

Question 6

What is this? 3 != 3

Answer 6

boolean bc it’s a comparison

Question 7

What is this? “Exam, Day, Soon”

Answer 7

string

Question 8

What is this? 5.9

Answer 8

float

Question 9

What is this? 2

Answer 9

integer

Question 10

What is this? 5.9 - 3

Answer 10

float

Question 11

What is this? 9 // 1

Answer 11

integer ( just 9 divided by 1)

Question 12

What is this? 5.9 x 3

Answer 12

float

Question 13

Concatenation

Answer 13

• fancy name for string
• has “ “ or ‘ ‘
• concatenate by +
  
  • like gluing strings
    together (no spaces)

Question 14

What is a method?

Answer 14

• function or command
• “called” with parenthesis
• to access method, use dot.operator

Question 15

What are the two parts of a string?

Answer 15

it’s data and it’s methods

Question 16

s = “panang Curry”
method = upper()
print(s.upper())
output?

Answer 16

PANANG CURRY

uppercase version of string

Question 17

s = “panang Curry”
method = lower()
print(s.lower())
output?

Answer 17

panang curry

lowercase version of string

Question 18

s = “panang Curry”
method = swapcase()
print(s.swapcase())
output?

Answer 18

PANANG cURRY

case of each letter is switched

Question 19

s = “panang Curry”
method = capitalize()
print(s.capitalize())
output?

Answer 19

Panang curry

1st letter capitalized and the rest are lowercase

Question 20

s = “panang Curry”
method = title()
print(s.title())
output?

Answer 20

Panang Curry

first letter of each word is caps and rest is lowercase

Question 21

How do you display:

She said “You need escape characters”
Which are: \important\

Answer 21

print(“She said "You need escape characters"” \nWhich are: \important\”

Question 22

Which escape character lets you use double quotes in a string?

Answer 22

"

Question 23

Which escape character lets you move to a new line?

Answer 23

\n

Question 24

Which escape character allows you to include backslash in output?

Answer 24

\

Question 25

Which escape characters allow for indents in strings?

Answer 25

\t

Question 26

User input

Answer 26

• store input IN VARIABLE
• ALWAYS returns a string

ex) num = input(“Enter a number: “) # num is string

input(“Enter a number: “) # useless

Question 27

Branching

Answer 27

• CONDITION that evaluates whether a boolean is true or false
• mutually exclusive
• only ONE statement will run
• multiple ifs = each if statement can potentially run depending on statement

Question 28

if CONDITION

Answer 28

• # do something
• only need if statement, doesn’t need elif or else

Question 29

elif CONDITION

Answer 29

• # do something
• NEEDS if statement

Question 30

else:

Answer 30

• # do something
• NEEDS if statement

Question 31

= vs ==

Answer 31

= used for assigning var to new value
== used in your condition for comparison in if statements and while loops– evaluates to true false

ex) var = 3
print(3==3) TRUE

Question 32

What’s the error in this branching example?

name = input(“What’s your name”)
if name == “Kyle” or “Beth”:
print(“Please come in”)

Answer 32

name = input(“What’s your name: “)

everything has an associated truth value
e.g.
non-empty string = True
non-zero number = True
non-empty list = True

so “Beth” evaluates to True always

Question 33

Tracing if-statements

x = 10
if x > 3 and x % 2 == 0:
print(“Success”)
else:
print(“Fail”)

1) What will get printed?
2) What values of x will print “Success”?

Answer 33

1) print(“Success”)
2) x = 10

Question 33

While loop

Answer 33

• Repeat code without writing repeated cote
• Great for when you r loop should break: “I wan to loop until the user inputs’q’”
  
  • while userinput !=’q’

Question 34

For Loop

Answer 34

• for each loop
  
  • for char in
    “abcdefghijklmno”
• Range loop
  
  • for i in range(start, stop,
    step)
  • for num in range(1)
  • for num in range(0,10)
  • for num in range(0,10,1)

Question 35

List and strings are SEQUENCES

Answer 35

• accessing individual elements
• indices start at 0
  
  • string example
  • name= “jenny”
  • list example
  • name= [“jenny”, “bob”,
    “tina”]

Question 35

List

Answer 35

• a collection of items
• create a new list using list() or [ ]
• are mutable

Question 36

someList.append(value)

Answer 36

adds value to end of a list

Question 37

someList.remove9vale)

Answer 37

Removes the first occurrence of value from the list

Question 38

List slicing

Answer 38

• used for getting a subset of a list
• list slicing returns another list
• specify range of indices
  
  • someList[start:end]

Question 39

items = [“shirt”, “shoes
, “pants”, “hat”, “socks”, “tank top”]
print(items[2:5])

What gets printed?

*hint– first item of a list always starts with the number 0

Answer 39

hat socks

Question 40

split( ) and join ()

Answer 40

• split turns a string into a list
• join turns a list into a string

charList = excelRow.split(“,”)
newString = “.”join(someList)

Question 41

1 items = [“shirt