Lists

Question 1

Element

Answer 1

Each value in a list is referred to as an element.

Question 2

Lists Format

Answer 2

Lists are created using square brackets ‘[ ]’. The basic syntax to create a list is as follows: my_list = [element 1, element 2, element 3, …]

Question 3

Empty List

Answer 3

You can create an empty list by using empty square brackets: empty_list = []

Question 4

Accessing Elements - Accessing a Single Element:

Answer 4

• The elements in a list are numbered with integers starting from 0.
• Access an individual list element by using the list’s name, followed by the element’s index enclosed in square brackets.

ex.) data = [2.71, 3.14, 1.41, 1.62]
print(data[1]) #Prints 3.14

Question 5

Negative Indexes

Answer 5

• Negative indexes will start from the end of the list.
• The index ‘-1’ refers to the last element in the list.
• The index ‘-2’ refers to the second last element in the list.

ex.) Courses = [‘History’, ‘Math’, ‘Physics’, ‘CompSci’]
print(courses[-2]) #prints Physics

Question 6

Modifying Lists

Question 7

Sorting Lists

Question 8

Looping Values

Question 9

Accessing Elements - Accessing Multiple Elements:

Answer 9

ex.) courses = [‘History’, ‘Math’, ‘Physics’, ‘CompSci’]
print(courses[0:2]) #prints History and Math

Question 10

Adding Elements to List Methods

Answer 10

1. Append method
2. Insert method
3. Extend Method

Question 11

Append Method

Question 12

Insert Method

Question 13

Extend Method