Loops and List Comprehensions

Question 1

The for loop specifies what?

for planet in planets:
print(planet, end=‘ ‘)

Answer 1

The variable name to use (in this case, planet)

The set of values to loop over (in this case, planets)

Question 2

What does the word in do?

Answer 2

Link two objects together

Question 3

If you wanted to repeat a loop multiple times what would you use?

Answer 3

range()

Question 4

While loops iterate until what?

Answer 4

Some condition is met

Question 5

The argument of the while loop is evaluated as a what?

Answer 5

Boolean statement

Question 6

The argument of a while loop is executed until the statement is what?

Answer 6

False

Question 7

For loops allow you to do what?

Answer 7

Iterate through a sequence

Question 8

Which one of these can be whatever you’d like it to be?

for item in seq:
print(item)

Answer 8

Variable name ‘item’

Question 9

What happens if you change the print statement in a for loop?

Answer 9

It’ll return whatever you printed, the same # of times as the sequence

Question 10

How would you convert this to a list?

range(0,9)

Answer 10

list(range(0,9))

Question 11

What would this return?

list(range(4))

Answer 11

[0,1,2,3]

Question 12

This allows you to save a bunch of writing when you’re trying to create a for loop to create a list

Answer 12

List comprehension

Question 13

How would you comprehend this list?

up = [ ]

for beez in u:
up.append(beez**2)

Answer 13

[beez**2 for beez in u]

Question 14

List comprehension is basically what?

Answer 14

a for loop but backwards