Beginner Topic 14 of 51 Algorithms
Radix Sort
Sorting digit by digit using a stable subroutine.
How it works
Sort numbers digit by digit from least to most significant using a stable sort per digit, giving O(d·(n + b)) for d digits in base b.
Where it is used
Sorting IDs, fixed-length strings, large integer arrays.
Common pitfall
Needs stable inner sort and fixed-width keys; floats and signed numbers need preprocessing.
Where it fits in the course
Radix Sort is topic 14 of 51 in Algorithms, rated Beginner. It follows Counting Sort. The next topic is Brute Force.
Practice and explore
- Open the interactive lesson, with a mini quiz.
- Take the Algorithms quiz.
- Explore the Sorting Algorithms visualizer: Bubble, selection, insertion, merge and quick sort animated.
How to study this topic
- Read the explanation above and restate the definition in your own words.
- Open the interactive lesson and answer its mini quiz.
- Read the common pitfall, then write a short example that avoids it.
- Check your understanding in the Algorithms quiz, and revisit the topic if you miss a question.
Frequently asked questions
What is Radix Sort?
Sorting digit by digit using a stable subroutine. It belongs to Algorithms and is a beginner-level topic.
Where do people use Radix Sort?
Sorting IDs, fixed-length strings, large integer arrays.
What is the most common mistake with Radix Sort?
Needs stable inner sort and fixed-width keys; floats and signed numbers need preprocessing.
What should I learn before this topic?
Start with Counting Sort, the topic just before it in Algorithms.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Algorithms quiz. You can also explore Sorting Algorithms in the Visual Lab.
Is Radix Sort hard to learn?
It is a Beginner topic, so it works as an entry point. If the terms are new, read the explanation twice and try the visualizer before the quiz.
How long does it take to learn Radix Sort?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Radix Sort?
Counting Sort, Brute Force, Quick Sort are closely connected. The full list is in the related topics section of this page.
What should I study after Radix Sort?
Continue with Brute Force, the next topic in Algorithms.
Related topics
- Counting Sort (Algorithms)
- Brute Force (Algorithms)
- Quick Sort (Algorithms)
- Two Pointers (Algorithms)