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Clean Code: A Handbook of Agile Software Craftsmanship (Robert C. Martin Series) Paperback – 1 Aug. 2008

by Robert Martin (Author)
4.6 out of 5 stars (6,572)
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Even bad code can function. But if code isn’t clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn’t have to be that way. Noted software expert Robert C. Martin presents a revolutionary paradigm with Clean Code: A Handbook of Agile Software Craftsmanship . Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer—but only if you work at it. What kind of work will you be doing? You’ll be reading code—lots of code. And you will be challenged to think about what’s right about that code, and what’s wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft. Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code—of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code. Readers will come away from this book understanding How to tell the difference between good and bad code How to write good code and how to transform bad code into good code How to create good names, good functions, good objects, and good classes How to format code for maximum readability How to implement complete error handling without obscuring code logic How to unit test and practice test-driven development This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.
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  1. ISBN-10
    9780132350884
  2. ISBN-13
    978-0132350884
  3. Edition
    1st
  4. Publisher
    Pearson
  5. Publication date
    1 Aug. 2008
  6. Part of series
    Robert C. Martin Series
  7. Language
    English
  8. Dimensions
    17.78 x 2.26 x 23.5 cm
  9. Print length
    464 pages
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  1. Functions should either do something or answer something, but not both.
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From the Publisher

The Clean Coder: A Code of Conduct for Professional Programmers (Robert C. Ma...
We, Programmers: A Chronicle of Coders from Ada to AI (Robert C. Martin Series)
Functional Design: Principles, Patterns, and Practices (Robert C. Martin Series)
Clean Architecture: A Craftsman's Guide to Software Structure and Design: A C...
Clean Agile: Back to Basics (Robert C. Martin Series)
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4.3 out of 5 stars 43
4.0 out of 5 stars 28
4.6 out of 5 stars 3,944
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Review

Even bad code can function. But if code isn't clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn't have to be that way.

Noted software expert Robert C. Martin presents a revolutionary paradigm with Clean Code: A Handbook of Agile Software Craftsmanship. Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer―but only if you work at it.

What kind of work will you be doing? You'll be reading code―lots of code. And you will be challenged to think about what's right about that code, and what's wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft.

Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code―of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code.

Readers will come away from this book understanding
  • How to tell the difference between good and bad code
  • How to write good code and how to transform bad code into good code
  • How to create good names, good functions, good objects, and good classes
  • How to format code for maximum readability
  • How to implement complete error handling without obscuring code logic
  • How to unit test and practice test-driven development
This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

--From the Back Cover

Even bad code can function. But if code isn't clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn't have to be that way.

Noted software expert Robert C. Martin presents a revolutionary paradigm with Clean Code: A Handbook of Agile Software Craftsmanship. Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer―but only if you work at it.

What kind of work will you be doing? You'll be reading code―lots of code. And you will be challenged to think about what's right about that code, and what's wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft.

Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code―of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code.

Readers will come away from this book understanding
  • How to tell the difference between good and bad code
  • How to write good code and how to transform bad code into good code
  • How to create good names, good functions, good objects, and good classes
  • How to format code for maximum readability
  • How to implement complete error handling without obscuring code logic
  • How to unit test and practice test-driven development
This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

--From the Back Cover

From the Back Cover

Even bad code can function. But if code isn't clean, it can bring a development organization to its knees. Every year, countless hours and significant resources are lost because of poorly written code. But it doesn't have to be that way.

Noted software expert Robert C. Martin presents a revolutionary paradigm with Clean Code: A Handbook of Agile Software Craftsmanship. Martin has teamed up with his colleagues from Object Mentor to distill their best agile practice of cleaning code “on the fly” into a book that will instill within you the values of a software craftsman and make you a better programmer―but only if you work at it.

What kind of work will you be doing? You'll be reading code―lots of code. And you will be challenged to think about what's right about that code, and what's wrong with it. More importantly, you will be challenged to reassess your professional values and your commitment to your craft.

Clean Code is divided into three parts. The first describes the principles, patterns, and practices of writing clean code. The second part consists of several case studies of increasing complexity. Each case study is an exercise in cleaning up code―of transforming a code base that has some problems into one that is sound and efficient. The third part is the payoff: a single chapter containing a list of heuristics and “smells” gathered while creating the case studies. The result is a knowledge base that describes the way we think when we write, read, and clean code.

Readers will come away from this book understanding
  • How to tell the difference between good and bad code
  • How to write good code and how to transform bad code into good code
  • How to create good names, good functions, good objects, and good classes
  • How to format code for maximum readability
  • How to implement complete error handling without obscuring code logic
  • How to unit test and practice test-driven development
This book is a must for any developer, software engineer, project manager, team lead, or systems analyst with an interest in producing better code.

Product details

  • ASIN ‏ : ‎ 0132350882
  • Publisher ‏ : ‎ Pearson
  • Publication date ‏ : ‎ 1 Aug. 2008
  • Edition ‏ : ‎ 1st
  • Language ‏ : ‎ English
  • Print length ‏ : ‎ 464 pages
  • ISBN-10 ‏ : ‎ 9780132350884
  • ISBN-13 ‏ : ‎ 978-0132350884
  • Item weight ‏ : ‎ 784 g
  • Dimensions ‏ : ‎ 17.78 x 2.26 x 23.5 cm
  • Part of series ‏ : ‎ Robert C. Martin Series
  • Best Sellers Rank: 124,012 in Books (See Top 100 in Books)
  • Customer reviews:
    4.6 out of 5 stars (6,572)

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  1. Robert C. Martin

    Robert C. Martin

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    Robert Cecil Martin (colloquially known as Uncle Bob) is an American software engineer and author. He is a co-author of the Agile Manifesto.

    Bio from Wikipedia, the free encyclopedeia. Photo by Tim-bezhashvyly (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons.

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    Robert Martin

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  3. Dean Wampler

    Dean Wampler

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    I run the engineering organization in IBM Research that is building "accelerated science" and digital health services. Previously, I developed Scala software at Lightbend and Domino Data Lab, and I helped spread the word about Ray at Anyscale. Besides Scala, my expertise includes MLOps, data systems, and the full software development lifecycle. I am also the author of several books:

    -- "Programming Scala, Third Edition", a practical book for experienced software developers that introduces this important, modern programming language.

    -- "Programming Hive", a comprehensive guide to Hive, the SQL tool for Hadoop (coauthors: Ed Capriolo and Jason Rutherglen).

    -- "Functional Programming for Java Developers", a succinct introduction for Java developers to the concepts of functional programming, where I motivate its importance and demonstrate how to use FP concepts in Java programs.

    -- I contributed to Robert Martin's classic, "Clean Code: A Handbook of Agile Software Craftsmanship"

    You can find out more about me at these web sites:

    -- http://deanwampler.com: My personal home page.

    -- http://polyglotprogramming.com: Presentations, white papers, etc.

    -- https://deanwampler.medium.com: My blog.

    -- https://linkedin.com/in/deanwampler: Career

    Social:

    -- https://twitter.com/deanwampler

    -- https://discuss.systems/@deanwampler

    -- https://post.news/@deanwampler

    My main hobby, photography:

    -- https://www.flickr.com/photos/deanwampler/

    -- https://glass.photo/bucktrends

    -- https://vero.co/bucktrends

    See more on the author's page
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Customer reviews

4.6 out of 5 stars
6,572 global ratings

Customers say

Customers find this book an absolute must-read for software engineers and programmers, praising its readability and thought-provoking content that makes them think about concepts. The writing quality is well-received, with one customer describing it as the "bible for writing high quality software." The code quality and ease of use receive mixed feedback, with some finding it easy to follow while others note formatting issues.
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58 customers mention readability, 52 positive, 6 negative
Customers find the book highly readable, describing it as a must-read for all software engineers and programmers, with plenty of good tips for learning how to develop good code.
...Following these, will help you write cleaner code that is easier to read and understand using less mental capacity, which will in turn allows your...Read more
This is a great book for programmers where it covers the skills of writing a clean code....Read more
This is a good book for beginner developers, or for whom who just want to review and refresh all the principles of the clean code....Read more
This is a good companion to the Clean Code video lectures...Read more
16 customers mention thought provoking, 13 positive, 3 negative
Customers find the book thought-provoking, making them think about concepts and providing insights and advice.
Thought provoking and well written. Uncle Bob eloquently shares his thoughts on how to make code easier to read, and why he feels that is important....Read more
...Disappointing, at the price. The content is useful, opinionated, but mostly common sense once you have a decent level of experience....Read more
Good, clear advice. Mostly Java examples - but hey, what the heck!?...Read more
There are some good points in this book, but I personally couldn't get on with the 'its my way of the highway' style of writing that was incorporated...Read more
16 customers mention writing quality, 14 positive, 2 negative
Customers appreciate the writing quality of the book, with one describing it as the "bible for writing high quality software."
This book is really great. It's clearly written and every opinion expressed feels "right" and fits well with practical experience....Read more
Thought provoking and well written. Uncle Bob eloquently shares his thoughts on how to make code easier to read, and why he feels that is important....Read more
...that seems obvious in hindsight -- well, that is the mark of a well written book, to make the concepts that clear....Read more
...Following these, will help you write cleaner code that is easier to read and understand using less mental capacity, which will in turn allows your...Read more
14 customers mention code quality, 9 positive, 5 negative
Customers have mixed opinions about the code quality in the book, with some appreciating the code examples and their explanations, while others find them poorly formatted.
This book has changed the way I code, hopefully for the better!...Read more
...These are not golden rules of programming. It seems like what the author, in his specific environment, wants to do....Read more
...all the book has some good concept about how to declutter and keep your code clean, it was mainly the repetition towards the end that really lets...Read more
...With its help I hope to submit an extremely well readable and structured code to my final year project. I recommend this book to everyone!Read more
12 customers mention ease of use, 8 positive, 4 negative
Customers have mixed opinions about the book's ease of use, with some finding it easy to follow, while one customer notes that the case studies are difficult to follow.
...It's clearly written, easy to understand and provides code examples both good and bad to explain its practices....Read more
...huge swathes of the book are devoted exclusively to Java, and use some fairly complex (and, in my opinion, not very well formatted) code to convey...Read more
Love it, Love it. Best book on the market!! Great code examples and easy to follow!! Definitely, recommend!Read more
Very readable, easily digested guidance. If you've ever watch the Uncle Bob videos you'll enjoy this book....Read more
Absolutely worth it
5 out of 5 stars
Absolutely worth it
The book was clean and brand new. Delivered faster than I expected. Awesome read. Definitely recommend
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Top reviews from United Kingdom

  • Jim
    5.0 out of 5 stars Excellent book
    Reviewed in the United Kingdom on 15 October 2025
    Format: PaperbackVerified Purchase
    This book has changed the way I code, hopefully for the better! Fittingly for a book about clean coding, it is cleanly written with clear examples and case studies.
    Helpful
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  • Steven Gilham
    5.0 out of 5 stars Does what it says on the tin
    Reviewed in the United Kingdom on 3 May 2009
    Format: PaperbackVerified Purchase
    Every so often, a book comes along that codifies best practice in a way that manages to illuminate the path from where things are right now, to a better place that we'd rather be -- things like Fowler et al. Refactoring: Improving the Design of Existing Code (Object Technology Series) or the Gang of Four Design patterns : elements of reusable object-oriented software. This is one of those books. And if much of the material is the sort that seems obvious in hindsight -- well, that is the mark of a well written book, to make the concepts that clear.

    Taking a series of real world examples -- open source projects with significant user bases, including FitNesse and JUnit -- a series of worked examples take us from good, or at least adequate, code, to a form which is better factored, and easier to read, with the steps along the way clearly marked. Yes, even some of Kent Beck's code is put under the microscope, and carefully polished that extra stage or two more.

    The reader is cautioned that, without working long hours to follow these examples, this will be just another of those feel-good books. I don't quite agree -- spending just a little time to follow the transformations, and then reflecting on one's own outpourings should be enough to make this a feel-bad book. All the sins from obscurely named variables to sprawling functions that gaily mix abstraction levels, we've all done them (especially programming in FORTRAN on minicomputers with slow stacks and a rule of thumb that 1 call ~ 40 loc in terms of performance).

    The maxim to take from the book is based on Baden-Powell's "Try and leave this world a little better than you found it", and owes to the same school of thought as "whenever you are in the garden, pull at least one weed". The meat of the book is in distinguishing what are the weeds from the intended crop.

    So read it, understand the examples, and then refer to it often -- like the other titles mentioned, it is a reference work, and should join them as among the most thumbed on your bookshelf.
    14 people found this helpful
    Helpful
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  • Andrej Lavrinovic
    5.0 out of 5 stars Everyone must read.
    Reviewed in the United Kingdom on 1 November 2023
    Format: PaperbackVerified Purchase
    So good. So easy formulated. So useful. A lot of things are so obvious, but for some reason not many developers are following such elementary rules. Highly recommend to read, and doesn't metter if you experienced developer or just begginer. I also wish this book to be translated on indian languages. Guys, I very much like you. We are very close mentally. I have a lot of indian friends due to proffession. But, the way you coding is .... pleas, please, please - read this book.
    4 people found this helpful
    Helpful
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  • Mr. D. N. Sumption
    4.0 out of 5 stars Book title needs refactoring
    Reviewed in the United Kingdom on 27 October 2008
    Format: PaperbackVerified Purchase
    This is a great book, and one which any developer will learn a great deal from. In most respects, it is a five-star book, but... the title is misleading. By rights it should be called "Clean Java Code".

    Let me explain: I am an ActionScript developer, and bought this book to improve my code style and structure. For the most part, it has done that: the chapters on naming, comments, functions and classes are absolutely superb. But then, huge swathes of the book are devoted exclusively to Java, and use some fairly complex (and, in my opinion, not very well formatted) code to convey their intention.

    I don't generally have a problem with using Java-oriented books to learn more general programming concepts (Martin Fowler's "Refactoring" and O'Reilly's Head-First Design Patterns are both books I would recommend to anyone, regardless of their language-of-choice), but around 1/3rd of Bob Martin's book is virtually impenetrable to anyone who does not already have significant Java experience.

    That said, I should re-iterate that this book will be hugely valuable to any programmer. I just wish that they had tried to use a little more pseudo-code and a little less real-world examples, with all of the complexities entailed, and I think a lot could have been done to make the Java code more readable for users of other languages.
    111 people found this helpful
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  • S
    5.0 out of 5 stars Very Useful
    Reviewed in the United Kingdom on 13 August 2010
    Format: PaperbackVerified Purchase
    The book starts out with a fairly lengthy description of how you should read it and that you shouldn't skip the case studied or you won't learn anything.

    As a person with limited understanding of Java (I am a PHP developer) I found the case studies very difficult to follow and don't think I got that much out of them.

    The more general chapters on the other hand were great. Very solid pragmatic advice on naming variables, constructing classes, writing functions and eliminating crap (spurious comments and such). Since reading it I feel as though I'm writing better code and there isn't much better endorsement of a coding book than that.

    Don't be put off by the fact that this is essentially a Java book - it's full of insights and advice that you can read one night and apply the next day at work to good effect.
    One person found this helpful
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  • Alexander E.
    5.0 out of 5 stars Hat mir persönlich sehr gut gefallen
    Reviewed in Germany on 13 April 2025
    Format: PaperbackVerified Purchase
    Ein Muss für jeden, der besser programmieren will – nicht nur für Anfänger

    „Clean Code“ hat mir persönlich sehr gut gefallen und ich würde es jedem empfehlen, der sich ernsthaft mit Softwareentwicklung beschäftigt – egal ob Anfänger oder erfahrener Entwickler.

    Als Ergänzung beim Programmieren lernen:
    Gerade wenn man neu ins Programmieren einsteigt, ist das Buch eine perfekte Ergänzung, weil es nicht nur zeigt, was man programmieren soll, sondern wie man es sauber und verständlich macht. Es geht weit über Syntax und Sprache hinaus und behandelt die Prinzipien guten Codes – etwas, das in vielen Kursen oft zu kurz kommt.

    Auch für Fortgeschrittene absolut lesenswert:
    Auch wenn man schon programmieren kann, lohnt sich die Lektüre. Das Buch hilft, schlechte Angewohnheiten zu erkennen und zu reflektieren, die sich im Laufe der Zeit eingeschlichen haben. Es geht dabei nicht um theoretische Regeln, sondern um praktische, nachvollziehbare Beispiele und konkrete Tipps, die man direkt umsetzen kann.

    Fazit:
    „Clean Code“ sollte jeder Programmierer kennen und gelesen haben. Es hat mir geholfen, meinen Code strukturierter, lesbarer und verständlicher zu schreiben – was nicht nur mir, sondern auch meinen Kollegen zugutekommt. Absolute Empfehlung für alle, die sauberen, wartbaren Code schreiben wollen – ein echter Klassiker der Softwareentwicklung.
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  • Cynthia
    5.0 out of 5 stars Excelente libro
    Reviewed in Mexico on 11 September 2025
    Format: PaperbackVerified Purchase
    Excelente libro
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  • User name im using
    5.0 out of 5 stars must read
    Reviewed in the Netherlands on 14 February 2025
    Format: PaperbackVerified Purchase
    .
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  • George
    5.0 out of 5 stars This book is worth it for any programming language.
    Reviewed in Australia on 27 March 2021
    Format: PaperbackVerified Purchase
    This is a great book. I have found the concepts informative and helpful. I'm glad I decided to get it. As an aid, I listened to the audio book version while I followed along reading it. This made taking notes a dream. I am now on my way to leveling up my programming skills.
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  • Emre AKA
    5.0 out of 5 stars süper
    Reviewed in Turkey on 25 June 2024
    Format: PaperbackVerified Purchase
    sağlam şekilde elime ulaştı. teşekkürler
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