Change List Items

How do you change a single item in a list?

Refer to the index number.

Code:

fruits = ["apple", "banana", "cherry"]

fruits[1] = "kiwi"

Output: ["apple", "kiwi", "cherry"]

How do you change a range of item values?

Use slice indexing to replace multiple items.

Code:

fruits = ["apple", "banana", "cherry", "orange"]

fruits[1:3] = ["kiwi", "mango"]

Output: ["apple", "kiwi", "mango", "orange"]

What happens when you replace a range with more items than you removed?

The list expands to fit the new items.

Code:

fruits = ["apple", "banana", "cherry"]

fruits[1:2] = ["kiwi", "mango"]

Output: ["apple", "kiwi", "mango", "cherry"]

What happens when you replace a range with fewer items than you removed?

The list shrinks as items are replaced by a smaller set.

Code:

fruits = ["apple", "banana", "cherry"]

fruits[1:3] = ["watermelon"]

Output: ["apple", "watermelon"]

How do you use the insert() method to add an item at a specific index?

insert() adds an item without deleting anything.

Code:

fruits = ["apple", "banana"]

fruits.insert(1, "orange")

Output: ["apple", "orange", "banana"]

Code Challenge: What is the result of replacing [0:2] with ["X"] in the list ["a", "b", "c"]?

Code:

vals = ["a", "b", "c"]

vals[0:2] = ["X"]

Output: ["X", "c"]