Module 10 of 15 · Step 1 of 15

Lists

A list keeps several values in a chosen order. Instead of making one variable for each language or score, put related values inside square brackets.

By the end of this lesson, you can:

Create and read list items
Explain zero-based and negative indexes
Change, append, and remove items
Count and loop through a list

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Learn · Keep related values together

Concept 1 of 6

Keep related values together

Write items between square brackets, separated by commas. A list can mix types, though keeping similar kinds together is often clearer for beginners. The order of items is remembered.

Pattern

languages = ["Python", "C", "Java"]

Code

languages = ["Python", "C", "Java"]
print(languages)

Output

['Python', 'C', 'Java']

Why it works

Square brackets create one list.
Commas separate its three text items.
Printing a whole list shows its bracketed representation.

Common mistake

Not this

languages = "Python", "C", "Java"

Try this

languages = ["Python", "C", "Java"]

Square brackets make the intended list explicit.