5. Loops and list comprehension

Question 1

Write a loop that prints out the items in the following list, all on the same line:
planets = ['Mercury', 'Venus', 'Earth', 'Mars', 'Jupiter', 'Saturn', 'Uranus', 'Neptune']

Answer 1

for planet in planets:
    print(planet, end=' ') # print all on same line

Question 2

What are the four components of a For loop

Answer 2

• For …
• the variable name to use (in this case, planet)
• the set of values to loop over (in this case, planets)
• You use the word “in” to link them together.

Question 3

In a For loop, can you use a tuple as the set of values to loop over?

Answer 3

Yes, can use a tuple!

Question 4

How would you loop through the characters in the string “hello” and print each of them out in the same line?

Answer 4

for char in "Hello":
  print(char,end='')

Question 5

Print numbers 1 to 5 using range() and for loop

Answer 5

for i in range(5):
print(i+1)

Question 6

Using a while loop, print the numbers from 1 to 10 on one line

Answer 6

i=1
while i < 11:
print(i, end = ' ')
i = i + 1

Question 7

L— c———- are one of Python’s most beloved and unique features

Answer 7

List comprehensions

Question 8

Create a list with the squares of the numbers from 1 to 10

Answer 8

squares = [n**2 for n in range(1,11)]

Question 9

Create a list with the squares of the odd numbers from 1 to 10, using list comprehension

Answer 9

squares = [n**2 for n in range(1,11) if n%2==1]