Multiple values under 1 variable name

Used to store collections of data

Created using square brackets ( eg. [ ] )

Values can be duplicated and order changed

Create a list

fruit = ["apples", "bananas", "oranges"]
print(fruit)

Use the len() function

fruit = ["apples", "bananas", "oranges"]
print(len(fruit))

Counting items starts at 0. Get the 2nd item.

fruit = ["apples", "bananas", "oranges"]
print(fruit[1])

Change a value of an item in the list

fruit = ["apples", "bananas", "oranges"]
print(fruit)
fruit[2] = "cherries"
print(fruit)

Multiple values under 1 variable name

Used to store collections of data

Values CANNOT be changed

Created using parentheses ( eg. ( ) )

Values can be duplicated and indexed, but the order CANNOT be changed

Create a tuple

fruit = ("apples", "bananas", "oranges")
print(fruit)

You cannot change values in a tuple

fruit = ("apples", "bananas", "oranges")
fruit[2] = "cherries"
print(fruit)

Can have a single value, but must include a comma at the end

this_tuple = ("apples",)
print(this_tuple)

Use the len() function

tuple = ("apples", "bananas", "oranges")
print(len(tuple))

Multiple values under 1 variable name

Used to store collections of data

Values are NOT ordered and NOT indexed

Values CANNOT be duplicated - they will be ignored

Created using curley braces ( eg. { } )

Create a set

fruit = {"apples", "bananas", "oranges", "apples"}
print(fruit)

Use the len() function

fruit = {"apples", "bananas", "oranges"}
print(len(fruit))

You cannot change values in a set

fruit = {"apples", "bananas", "oranges", "apples"}
print(fruit)
fruit[1] = "grapes"
print(fruit)