U of W Bits

Question 1

log something

Answer 1

print(‘something’)

Question 2

make a variable

Answer 2

variable = 123

Question 3

get the type of something

Answer 3

type(‘thing’) # string

Question 4

make a comment

Answer 4

number sign
> #this is a comment

Question 5

What are the types in python?
what do we call arrays and objects in python?

Answer 5

Text Type: str
Numeric Types: int, float, complex
Sequence Types: list, tuple, range
Mapping Type: dict
Set Types: set, frozenset
Boolean Type: bool
Binary Types: bytes, bytearray, memoryview
None Type: NoneType

object = dictionary
array = list

Question 6

convert types

Answer 6

str(123)
float(123) #123.0
int(123.7) #123 (just removes the decimal)

Question 7

get input

Answer 7

input()

Question 8

get the length of a string

Answer 8

len(‘123’) #3

Question 8

what happens with this with this if you input a number like 32?
if input() > 10:
print(‘yes’)

Answer 8

error. It does not implicitly convert
have to do:
if int(input()) > 0:
print(‘yes’)

Question 9

slice a bit of a string

Answer 9

‘01234’[0:2] # ‘01’

Question 10

concatenate a string

Answer 10

‘01’ + ‘23’ # ‘0123’

Question 11

Difference between:

result = ‘one’ + 2
print(result)

and

result = 1 + ‘two’
print(result)

Answer 11

both will fail. have to explicitly convert

Question 12

repeat a string

Answer 12

‘two’ * 3 # ‘twotwotwo’

Question 13

initiate a loop (while loop)

Answer 13

counter = 0

while counter < 10:
print(‘hello’)
counter = counter + 1

Question 14

initiate a loop with the conditions applied (for loop)

Answer 14

1 for counter in range(10, 15):
2 print(“counter is”, counter)

counter is 10
counter is 11
counter is 12
counter is 13
counter is 14

Question 15

stop a loop
skip this iteration of the loop

Answer 15

break
continue

Question 16

declare a function

Answer 16

def my_function():
print(“Hello from a function”)

Question 17

Do an else and else if statement

Answer 17

if x > 0:
code
else x < 0:
code
elif:
code

Question 18

do and or and not

Answer 18

and
or
not

just the words

Question 19

What happens with this:
def square(x):
return x*x
print(square(7, 11))

Answer 19

error
too many arguments. same with too few

Question 20

define a list
access an element

Answer 20

apple = [0, 1, 2]

print(apple[1])

Question 21

get the length of a list

Answer 21

len([1, 2]) #2

Question 22

concatenate a list

Answer 22

[1, 2] + [1, 2] # [1, 2, 1, 2]

Question 23

duplicate list elements

Answer 23

[1, 2] * 3 # [1, 2, 1, 2, 1, 2]

Question 24

get the max value in a list
sum the list

Answer 24

print(sum(list))
print(max(list))

Question 25

loop over a list (using built in for loop)

Answer 25

apple = [0] * 20

for x in apple:
print(x)

Question 26

loop over a string (using built in for loop)

Answer 26

for x in ‘apple’:
print(x)