List

A list is a row of boxes under one name: scores = [90, 75, 88]. Each item sits at a numbered position — its index — and counting starts at 0, so scores[0] is 90. You can add items, remove them, and loop over the whole row in one line.

Lists are the first data structure every programmer meets, and the most used: a playlist, a to-do list, the messages in a chat — all lists.