DSA - Data Structures and Algorithms. W3Schools lessons in English

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DSA Tutorial

Learn Data Structures and Algorithms

Data Structures and Algorithms (DSA) is a fundamental part of Computer Science that teaches you how to think and solve complex problems systematically.

Using the right data structure and algorithm makes your program run faster, especially when working with lots of data.

Knowing DSA can help you perform better in job interviews and land great jobs in tech companies.

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This Tutorial

This tutorial is made to help you learn Data Structures and Algorithms (DSA) fast and easy.

Animations, like the one below, are used to explain ideas along the way.

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In sign

{{ resultText }}: {{ currVal }}

First, you will learn the fundamentals of DSA: understanding different data structures, basic algorithm concepts, and how they are used in programming.

Then, you will learn more about complex data structures like trees and graphs, study advanced sorting and searching algorithms, explore concepts like time complexity, and more.

This tutorial will give you a solid foundation in Data Structures and Algorithms, an essential skill for any software developer.

Try it Yourself Examples in Every Chapter

In every chapter, you can edit the examples online, and click on a button to view the result.

The code examples in this tutorial are written in Python, C, and Java. You can see this by clicking the "Run Example" button.


my_array = [7, 12, 9, 4, 11]
minVal = my_array[0]

for i in my_array:
    if i < minVal:
        minVal = i

print('Lowest value:',minVal)
Run Example »

What You Should Already Know

Although Data Structures and Algorithms are actually not specific to any programming language, you should have a basic understanding of programming in one of these common programming languages:

DSA History

The word 'algorithm' comes from 'al-Khwarizmi', named after a Persian scholar who lived around year 800.

The concept of algorithmic problem-solving can be traced back to ancient times, long before the invention of computers.

The study of Data Structures and Algorithms really took off with the invention of computers in the 1940s, to efficiently manage and process data.

Today DSA is a key part of Computer Science education and professional programming, helping us to create faster and more powerful software.

DSA Exercises

Test Yourself With Exercises


What does DSA stand for?

DSA stands for  Structures and .

DSA Quiz ?

Learn by taking a quiz! The quiz will give you a signal of how much you know about Data Structures and Algorithms.

Start DSA Quiz

Learn by Examples

Learn by examples! This tutorial supplements all explanations with clarifying examples.

See All DSA Examples