Collections Basics 1

This group of exercises focuses on getting a hands-on feel for lists and their syntax. The tasks will repeat how to:

• Create a list with data
• Append and remove elements
• Loop over a list's elements

Usage

Lists can be stored in variables just like Strings can. For example to store a list of car brands you could create a variable car_brands with a list of brands like 'BMW', 'Audi', and 'Volkswagen'. This translates to the following code:

car_brands = ['BMW', 'Audi', 'Volkswagen']

Elements in this list can be accessed by zero-based, numbered indizes. For example car_brands[0] would return BMW.

To work with all elements in a list you can loop over its elements and for example print them like this:

for brand in car_brands:
  print(brand)

Lists can also be altered. Elements can be added using the append method:

car_brands.append('Volvo')

Using indizes elements can also be removed from a list again using the pop method:

car_brands.pop(0)

Tasks

Task 1

Create a variable called fruits and one after another add the elements Apples, Cherries and Strawberries. Loop over the list fruits and print every element to the screen.

• Your result should look like this:

Apples
Cherries
Strawberries

Task 2

Create a variable cities which holds a list with the cities London, Paris, Berlin and Amsterdam. Print the sentence The capital city of Germany is: Berlin to the screen, using the string Berlin from the cities array.

• Your result should look like this:

The capital city of Germany is: Berlin

Task 3

Store the colors cyan, magenta, green, yellow, black and white in a list called colors. Remove the colors green and white. Print the remaining colors to the screen.

• Your result should look like this:

cyan
magenta
yellow
black

Task 4

Store the letters p, e, n, g, u, i, n in a list. Combine those letters into a single string penguin. Capitalize that string and print it to the screen.

• Your result should look like this:

Penguin