Python Lists & 1D Arrays Explained | IGCSE | python | programming | computer science

Veröffentlicht am: 29 Juni 2026
auf dem Kanal: Learn With Sahil

Welcome to one of the most critical topics for your programming exam! In this video, we introduce One-Dimensional (1D) Arrays and Lists, which are vital for storing collections of data in the Cambridge IGCSE Computer Science (0478 / 0984) syllabus.

Up until now, we have only stored single values in single variables. In this lesson, you will learn how to store multiple pieces of related data under a single identifier using Arrays (represented as Lists in Python).

In this tutorial, we break down:
The fundamental concept of a 1D Array and why we need them in data structures.
How to declare and initialize a list in Python.
Understanding Indexing: How to access, change, and update specific items inside a list (remembering that Python indexes start at 0!).
Finding the size or length of an array dynamically.
The differences between how arrays are written in Python code vs. IGCSE exam Pseudocode.

Introduction to 1D Arrays & Lists
Why do we need Arrays? (The Core Concept)
Creating and Initializing Lists in Python
Understanding Index Positions (0-Based Indexing)
Modifying and Accessing List Elements
Tracking Array Length
Translating Python Lists to IGCSE 1D Arrays in Pseudocode
Summary & Array Challenge

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