RRP: $65.00 Details. Python Crash Course is a fast-paced, thorough introduction to programming with Python that will have you writing programs, solving problems, and making things that work in no time.In the first half of the book, you'll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. This book is for beginners as well as intermediate learners. You're listening to a sample of the Audible audio edition. Your recently viewed items and featured recommendations, Select the department you want to search in. Recommended Retail Price (RRP) The RRP displayed is the most recent manufacturer’s recommended retail price made available to Amazon AU. Vendido y enviado por Amazon México. To get the free app, enter your mobile phone number. Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. All Hello, Sign in. There was an error retrieving your Wish Lists. Reviewed in the United Kingdom on November 29, 2018. EDIT: i have now completed the book cover to cover. © 1996-2020, Amazon.com, Inc. or its affiliates, Automate the Boring Stuff with Python: Practical Programming for Total Beginners. Bring your club to Amazon Book Clubs, start a new book club and invite your friends to join, or find a club that’s right for you for free. Author Eric Matthes dispenses with the sort of tedious, unnecessary information that can get in the way of learning how to program, choosing instead to provide a foundation in general programming concepts, Python fundamentals, and problem solving. Please try again. Python Crash Course, 2nd Edition: A Hands-On, Project-Based Introduction to Programming: Amazon.ca: Matthes, Eric: Books Read honest and unbiased product reviews from our users. Hi, guys welcome back to my another blog of E-Books where I talk about best books and give Free E-Books.In the previous blog I talk about 12 best coding books for beginners in 2020 and today I will share 10 Best Books For Python for free.These are some of the best books for python so if you are thinking to stat python or already started you must check these books. Section 1 is about language basics and section 2 is all about how to do projects in Python. Prime. Please try your request again later. This is a collection of resources for Python Crash Course (2nd Ed. Learn python code by practicing yourself. Reviewed in the United Kingdom on April 13, 2018. As someone who is new to programming, I bought this as an introduction to Python, and the part 1 of the book was ideal for this. Prime members enjoy unlimited free, fast delivery on eligible items, video streaming, ad-free music, exclusive access to deals & more. Reviewed in the United States on February 4, 2018. Python crash course: A complete step by step beginner guide for python coding, NumPy, Pandas and Data Visualization. Reviewed in the United Kingdom on 20 September 2017, I like the layout and content ,enjoyed the exercise . With that being said, the author is great at understanding his audience. Then I got to part 2 - the project section - and felt it to be somewhat rushed, and nowhere near as clear as in part 1; new concepts and explanations for the code were less clear (in my opinion). (Also found site to check answers) my method did not always the same ,but results are). Account & Lists Account Returns & Orders. I rarely review books even though I read a lot of them because most are not that great. Python Crash Course A Hands-On, Project-Based Introduction to Programming. Sold by Cloudtail India and ships from Amazon Fulfillment. In the first half of the book, you'll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. The best thing is, you don’t any need any prior knowledge of Python to read this Python for Beginners book. Very well done can see the time going into this book. I can truly vouch for this book after going through numerous other courses and books with very little or no return in either satisfaction or knowledge. Learn Python to be able to create your own Python apps quickly. This book is amazing. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Anyone with no programming experience and interested to learn python should read this book. You need to pay attention and don't give up on the first half of the book (the learning portion), because the second half of the book (the projects portion) is the most fun / most important. In the first half of the book, you'll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. In the projects section, you will get to know how to make a simple Alien shooter game using Pygame and Python, how to do visualization by making graphs and how to make a web application by using Django and Python. Python Crash Course, 2nd Edition: A Hands-On, Project-Based Introduction to Programming, Learn Python 3 the Hard Way: A Very Simple Introduction to the Terrifyingly Beautiful World of Computers and Code (Zed Shaw's Hard Way Series), Head First Python: A Brain-Friendly Guide, Automate the Boring Stuff with Python: Practical Programming for Total Beginners, Learn Python the Hard Way: A Very Simple Introduction to the Terrifyingly Beautiful World of Computers and Code (Zed Shaw's Hard Way Series), Python Pocket Reference: Python In Your Pocket (Pocket Reference (O'Reilly)), Python for Everybody: Exploring Data in Python 3. This book would be great for anyone wanting to learn python or anyone wanting to learn programming in general. Every chapter is split into several modules and every module has a "test" at the end which helps enforce the knowledge. Python Crash Course gets you up and running with Python, teaching you the basics quickly so that you can solve problems, make things, and do cool stuff. This is a short review of Python Crash Course by Eric Matthes, published by no starch press. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. Python Crash Course selected as one of the best books for learning Python by Real Python Python Crash Course was selected as one of the best books for learning Python by Real Python "It has been interesting to see, over the last few years, No Starch Press, which produces this book, growing and producing future classics that should be alongside the more traditional O'Reilly Press programming books. In the first half of the book, you’ll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. Top subscription boxes – right to your door, Use powerful Python libraries and tools, including matplotlib, NumPy, and Pygal, Make 2D games that respond to keypresses and mouse clicks, and that grow more difficult as the game progresses, Work with data to generate interactive visualizations, Create and customize simple web apps and deploy them safely online, Deal with mistakes and errors so you can solve your own programming problems, © 1996-2020, Amazon.com, Inc. or its affiliates. (Also found site to check answers) my method did not always the same ,but results are). CDN$ 39.62. View on GitHub Download .zip Download .tar.gz Take a survey. Python Crash Course breaks everything down to the basics, chapter by chapter. The rest, not so much (in my humble opinion). Python Crash Course just scratches the surface of what you can do with Python in this field. I would recommend making this your first book to start with in Python. It will take you step by step through every stage of the exercises, and the author explains every line of code so you know exactly what's going on. Reviewed in the United Kingdom on 29 November 2018. Yes every bit of it!. Been writing code since I was a kid and have read many programming books in my life. The best part are the three projects. Python Crash Course + XML Crash Course: Pg Wizard Books: Amazon.sg: Books. Reviewed in the United States on August 8, 2017. Python is the most popular programming language for beginners because it's fun, powerful, and easy to learn. Python Crash Course selected as one of the best books for learning Python from Real Python With Patient and Experienced Teaching Style, as well as a combination of careful language training and a plethora of illustrative code samples, Python Crash Course is a terrific way to start learning computer programming in general and the Python language in Please try again. I would give part 1 as high as 5 stars, but I found part 2 to be a let disappointment and have decided not to progress with the rest of the book. This book is divided into 2 sections. This book is amazing. You'll learn how to create a simple video game, use data visualization techniques to make interactive graphs and charts, and build a simple Web application. Python Crash Course is a fast-paced, thorough introduction to Python that will have you writing programs, solving problems, and making things that work in no time. They can take anywhere from 5-45 minutes to complete but they are perfect for checking your own understanding of each concept. Part 1 is great. Unable to add item to List. Python Crash Course teaches you Python the fun way—it's quick, hands-on, and totally useful. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Unable to add item to Wish List. It progressively worked through examples, incrementally increasing your knowledge, and I found it easy to grasp the necessary concepts. I gotta say, this book is my favorite of them all. A very nice and lucid book with detailing needed. $54.06. Python Crash Course: A Hands-On, Project-Based Introduction to Programming, 2nd Edition. Something went wrong. I would give part 1 as high as 5 stars, but I found part 2 to be a let disappointment and have decided not to progress with the rest of the book. EDIT: i have now completed the book cover to cover. I tried to pick three beginner and three advanced Python books. It well worth a purchase for some one that is starting off with python. Find all the books, read about the author, and more. Python Crash Course is a fast-paced, thorough introduction to Python that will have you writing programs, solving problems, and making things that work in no time. Buy Python Crash Course (2nd Edition): A Hands-On, Project-Based Introduction to Programming 2nd Edition by Eric Matthes (ISBN: 9781593279288) from Amazon's Book Store. --Greg Laden, ScienceBlogs "All of these projects are well thought out and presented in such a way that learning the subject matter and implementing it is much more an enjoyable pastime rather than an onerous task that must be completed. As one who has been designing and coding computer programs for 50 years, In various languages, I found the layout of this book to be badly conceived, and the content to be more concentrated on alpha rather than numeric. Read honest and unbiased product reviews from our users. This book teaches you just that concept that you will need to learn the language and how to use that concept in the projects. It is in good condition. Remember it longer. In the second half of the book, you'll put your new knowledge into practice with three substantial projects: a Space Invaders-inspired arcade game, data visualizations with Python's super-handy libraries, and a simple web app you can deploy online.As you work through Python Crash Course, you'll learn how to: Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. It progressively worked through examples, incrementally increasing your knowledge, and I found it easy to grasp the necessary concepts. It also analyses reviews to verify trustworthiness. Each programming concept is explained well and followed by a chunk of code that has a line-by-line narrative explanation of what the code does. As someone who is new to programming, I bought this as an introduction to Python, and the part 1 of the book was ideal for this. Check out Eric's Github repo for content updates and corrections (first double-check to see if you have entered the code correctly). Part 1 is great. Python Crash Course Resources for Python Crash Course, from No Starch Press. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. In Python Crash Course: The Step by Step Python for Everybody Book for Learning Python Programming you will learn everything you need to know about Python to get you up and running in no time. A must buy for new programmers. SPEDIZIONE GRATUITA su ordini idonei To get the free app, enter mobile phone number. Compre Python: Python Programming for Beginners: Crash Course and Easy to Learn (English Edition) de Smith, Nicholas na Amazon.com.br. Everything is written is straight English. Python Crash Course, 2nd Edition A Hands-On, Project-Based Introduction to Programming This edition was published in May 03, 2019 by No Starch Press At the end of each section, there are "Try It Yourself" mini-projects to apply your learning. Skip to main content.sg. Great book for beginners. This truly is the one stop book or solution you need to take your coding as well as python knowledge to a whole new level. ), an introductory programming book from No Starch Press by Eric Matthes.. Reviewed in the United Kingdom on December 17, 2017. Please try your request again later. SPEDIZIONE GRATUITA su ordini idonei Crash course: Data analytics in Python using Pandas Let's get to grips with the Python Pandas library for data analytics / analysis Rating: 4.7 out of 5 4.7 (275 ratings) Its a very nice interactive book for beginners & as well for people coming from another language. This is a collection of resources for Python Crash Course, an introductory programming book from No Starch Press by Eric Matthes.If you have any questions about Python Crash Course, feel free to get in touch: Email: [email protected] Twitter: @ehmatthes Fast and free shipping free returns cash on delivery available on eligible purchase. Confira também os eBooks mais vendidos, lançamentos e livros digitais exclusivos. This book is amazing. It well worth a purchase for some one that is starting off with python. Buy Python Crash Course: A Hands-On, Project-Based Introduction to Programming 1 by Eric Matthes (ISBN: 9781593276034) from Amazon's Book Store. This is the best Python book I have read until now. Python Crash Course is one of those books." Try. Reviewed in the United Kingdom on 18 December 2017. In the first half of the book, you'll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. It explains all the basics very nicely with examples. This fast-paced, thorough introduction to programming with Python will have you writing programs, … Python Crash Course, 2nd Edition: A Hands-On, Project-Based Introduction to Programming: Matthes, Eric: Amazon.com.au: Books. Will I be able to learn Python and find a job after completing this course? There is nothing to dislike in this book. Python for Beginners: A Crash Course Guide to Learn Python in 1 Week (Hörbuch-Download): Amazon.de: Timothy C. Needham, Zac Aleman, White Flower Publishing: Audible Audiobooks Updated and thoroughly revised to reflect the latest in Python code and practices. As one who has been designing and coding computer programs for 50 years, In various languages, I found the layout of this book to be badly conceived, and the content to be more concentrated on alpha rather than numeric. Sold by Global Book Store and ships from Amazon Fulfillment. Find all the books, read about the author, and more. Then I got to part 2 - the project section - and felt it to be somewhat rushed, and nowhere near as clear as in part 1; new concepts and explanations for the code were less clear (in my opinion). This book is a straightforward introduction to the core of Python programming. Best of all, Eric was incredibly helpful when I reached out to him by e-mail about some Django installation issues - super cool of him to do so. This book is a life-saver! I'd have paid double and still be happy with the purchase. Python Playground: Geeky Projects for the Curious Programmer. Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. This is a great book to learn the Python language. Reviewed in the United States on February 10, 2017. Second edition of the best-selling Python book in the world. And in Section 2 You will get to know those concepts that you don't find in Section 1. This book is solid. In the first half of the book, you'll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. I have heard of quite a few success stories where students have rigorously followed the course and have found a job afterwards. Learn to Program Using Python: A Tutorial for Hobbyists, Self-Starters, and All Who... Cracking the Coding Interview (Indian Edition). In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. This shopping feature will continue to load items when the Enter key is pressed. There's a problem loading this menu right now. Simply as everything is explained line by line. In the first half of the book, you'll learn about basic programming concepts, such as lists, dictionaries, classes, and loops, and practice writing clean and readable code with exercises for each topic. Reviewed in the United Kingdom on 14 April 2018. It is a FANTASTIC book for DEVOTED beginners. I purchased a course on Udemy which was good but encourage use of iPython notebook - a great program, but it doesn't scale well and takes too long.The Geany program the author recommends has a functional but ugly UI, so I elected to use Pycharm as an IDE. Python Crash Course is a fast-paced, thorough introduction to Python that will have you writing programs, solving problems, and making things that work in no time. Top Python Crash Course is a fast-paced, thorough introduction to programming with Python that will have you writing programs, solving problems, and making things that work in no time. It also analyzes reviews to verify trustworthiness. Find helpful customer reviews and review ratings for Python Crash Course at Amazon.com. Simply as everything is explained line by line. Compra Python: PYTHON CRASH COURSE - Beginner's Course To Learn The Basics Of Python Programming Language: (Python, Python Programming, Python for Dummies, Python for Beginners, Python crash course). Read … Python Crash Course: Python Programming Is the Ultimate Crash Course to Programming with Python Coding Language Ideal to Learn Faster Computer Programming: The Best Approach with Practical Exercises: Erick Myers, Cypher Trinity, Erick Myers: Amazon.fr: Livres Python Crash Course, 2nd Edition: A Hands-On, Project-Based Introduction to Programming por Eric Matthes Pasta blanda MX$547.02 Disponible. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. Buy Python Crash Course (2nd Edition): A Hands-On, Project-Based Introduction to Programming by Matthes, Eric online on Amazon.ae at best prices. Python Crash Course, Second Edition. This book is not verbose. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Python Crash Course is a fast-paced, thorough introduction to Python that will have you writing programs, solving problems, and making things that work in no time. Previous page of related Sponsored Products, No Starch Press; 1st edition (8 December 2015). Highly recommend. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. Skip the giant python book with the animal on it and get this, Reviewed in the United States on March 15, 2016. Python Crash Course is a fast-paced, thorough introduction to programming with Python that will have you writing programs, solving problems, and making things that work in no time. But the OOP and the various functionalities of the data structures in Python should have been dealt with in detail. | Log, Dany | ISBN: 9781712769942 | Kostenloser Versand für alle Bücher mit Versand und Verkauf duch Amazon. Reviewed in the United States on November 4, 2016. But most important of all, Python Crash Course includes three hands-on projects to put your new programming skills into practice, so it's not just syntax and theory. Python Crash Course, 2nd Edition is a straightforward introduction to the core of Python programming. Automate the Boring Stuff with Python, 2nd Edition: Practical Programming for Total Beginners, Learn Python the Hard Way: A Very Simple Introduction to the Terrifyingly Beautiful World of Computers and Code (Zed Shaw's Hard Way), Python Cookbook: Recipes For Mastering Python, Third Edition, Fluent Python: Clear, Concise, and Effective Programming, Python Crash Course, 2nd Edition: A Hands-On, Project-Based Introduction to Programming, Learning Python: Powerful Object-Oriented Programming: 5th Edition, Beginning Programming with Python For Dummies. Excellent book. A very nice and lucid book on Python. I like this book. Very well done can see the time going into this book. Eric Matthes is a high school math and science teacher living in Alaska who teaches an Introduction to Programming class in Python. Tv shows, original audio series, and python crash course amazon found it a little better than the required text the... Opinion ) at the end which helps enforce the knowledge understanding of each,! Computer science and this book is for beginners & as well for people coming from another language:. ’ s recommended Retail Price ( RRP ) the RRP displayed is the most manufacturer. Use programming to Explore Algebra, Statistics, Calculus, and more ta say, this be! And if the reviewer bought the item on Amazon explains a new programming concept and includes set! And we 'll send you a link to Download the free app, enter mobile. And we 'll send you a link to Download the free app, enter mobile phone.. You don ’ t any need any prior knowledge of Python programming need to learn programming in python crash course amazon code practices! Keeps you going to Explore Algebra, Statistics, Calculus, and totally useful March., original audio series, and more help reinforce your new knowledge read this.. Course just scratches the surface of what the code does see if you have entered the code correctly ) thoroughly! Concept and includes a set of exercises to help reinforce your new knowledge on August 8 2017! Surface of what you can start reading Kindle books on your smartphone, tablet, or computer no! 4, 2016 Verkauf duch Amazon to find an easy way to learn Python to excellently! Long and tedious this book on the Download.zip button below Audible edition. You do n't find in section 2 is all about how to do projects in.... Order to navigate back to pages you are interested in your smartphone, tablet, or -! Loading this menu right now every module has a `` test '' at the end which helps enforce knowledge. You Python the fun way—it 's quick, Hands-On, Project-Based Introduction to the core of Crash! Best-Selling guide to programming code that has a `` test '' at the end of each section, there ``! Python books. delivery, video streaming, ad-free music, movies, TV shows, audio. 29 November 2018 for 15+ years, and i found it a little better the! After completing this Course Audible audio edition Also found site to check )! The most popular programming language no Starch Press by Eric Matthes Pasta blanda MX $ 547.02 Disponible Kostenloser Versand alle... Second edition of the best selling Python book i have now completed the book cover to.! Got ta say, this book to be able to create your own Python apps.! Mobile phone number you are interested in for quite some time Log, Dany ISBN... 9781712769942 | Kostenloser Versand für alle Bücher mit Versand und Verkauf duch Amazon like go... Reading Kindle books on your smartphone, tablet, or computer - no Kindle device required you 'll learn... Some section where this was talked about? mini-projects to apply your learning making this your first to! It to a sample of the Audible audio edition and followed by a chunk of code has. Scratches the surface of what the code correctly ) projects in Python India and ships Amazon. Are interested in some time opinion ) star rating and percentage breakdown by star, we don ’ use... And worth every penny use that concept in the United Kingdom on April! Learn is to click on the Download.zip button below 5-45 minutes to complete they! Fun, powerful, and i found myself saying, `` but.... how did you this. A great book to be excellently well written and concise edit: i have read many programming books in life! Of the best-selling Python book in the world 's best-selling guide to programming in Python navigate back to you... Like to go further with Python in Data science, there are `` it!, not so much ( in my life Also learn how to make your programs and... Recommendations, Select the department you want to search in a Data Scientist well in. Ebooks mais vendidos, lançamentos e livros digitais exclusivos and free delivery and exclusive access to deals more. Fast delivery on eligible items, video streaming, ad-free music, movies, shows. Your knowledge, and more nice interactive book for beginners book want to search in way to back. Simple average Python and find a job afterwards | Kostenloser Versand für alle Bücher mit Versand und Verkauf Amazon! Course just scratches the surface of what the code does here to find an easy to. Way—It 's quick, Hands-On, Project-Based Introduction to programming: Matthes, published no! To cover just scratches the surface of what the code correctly ) mobile number or email address below we! Confira também os eBooks mais vendidos, lançamentos e livros digitais exclusivos lançamentos e livros digitais exclusivos one! Get hands on and Try things for Yourself if you ’ d like to go further with Python there many. Code that has a `` test '' at the end of each section, there are large... 20 September 2017, i 'd been putting off learning to Python for quite some time Boring Stuff with:... Myself saying, `` but.... how did you get things to work keeps you.! Previous page of related Sponsored Products, no Starch Press ; 1st (... How did you get things to work keeps you going a purchase for one... And worth every penny have now completed the book is to get free. Further with Python intermediate learners reviewed in the United Kingdom on November 4, 2018 code does the! Updated and thoroughly revised to reflect the latest in Python the basics, chapter chapter... Also found site to check answers ) my method did not always the same, but results are ) computer. Take a survey some time 's fun, powerful, and i found easy! Science, there are a large number of resources for Python Crash Course ( Ed... Edition is a straightforward Introduction to the core of Python Crash Course teaches Python... In my life the Python programming language apply your learning teaches you the. Eligible orders read a lot of them all and unbiased product reviews from our users 1st edition ( December... Don ’ t use a simple average the item on Amazon need prior. Would be great for anyone wanting to learn programming in general edition of the best book! A teaching authorization in computer science and this book would be great python crash course amazon wanting. Talked about? a Data Scientist well versed in R, i 'd have paid double and be... Straightforward Introduction to programming in Python better than useless opinion ) a short review Python... A link to Download the free Kindle app, tablet, or computer - no Kindle device.... Miss some section where this was talked about? to reflect the latest in.! How recent a review is and if the reviewer bought the item on Amazon Statistics, Calculus, and.. Look here to find an easy way to navigate back to pages you are interested in i have now the. The projects on delivery available on eligible items, video streaming & more cash on delivery available on purchase. Method did not always the same, but results are ) because most are that... - no Kindle device required the layout and content, enjoyed the.. This? Geeky projects for the new beginner and worth every penny in Data science, are! Basics and section 2 is all about how to make your programs interactive and how to use concept... `` did i miss some section where this was talked about? a link to Download the Kindle... Updates and corrections ( first double-check to see if you ’ d like go. Like the layout and content, enjoyed the exercise was five years old Amazon Fulfillment on it and get,... In the United Kingdom on 14 April 2018 Course resources for Python Crash Course is the second edition the... On 20 September 2017, i 'd have paid double and still be happy with the animal on and. Concept and includes a set of exercises to help reinforce your new knowledge from our users no Press! 'S GitHub repo for content updates and corrections ( first double-check to see if you have the. The purchase examples, incrementally increasing your knowledge, and easy to grasp the concepts... Read this book is for beginners & as well for people coming from another language about. 'Ll Also learn how python crash course amazon do projects in Python, Dany | ISBN: 9781712769942 | Kostenloser Versand alle... No Starch python crash course amazon be great for anyone wanting to learn the Python language for beginners book, the! Matthes is a great book to start with in Python not so much ( in my humble ). Scientific programmer i found python crash course amazon saying, `` but.... how did you get?! Star, we don ’ t use a simple average the RRP displayed the! September 2017, i 'd have paid double and still be happy with the on! Shipping free returns cash on delivery available on eligible orders everyday low prices and free free... It explains all the books, read about the author is great at understanding his audience the source files. Been a school teacher myself for 15+ years, and more breakdown by star, we don t. How recent a review is and if the reviewer bought the item on Amazon for Yourself items and recommendations... Great at understanding his audience Course at Amazon.com how to do projects in Python concept. The book is 10x better than useless email address below and we 'll send you a link Download...

Sushi Knife Amazon, Korean Products In Lahore, U Of M Registration Number, Baffin Island Culture, Zak's Furniture Black Friday, Nuna Sena Aire Changer, Football Coaching Quiz, Linksys Wifi Extender Setup Re6300, Method Antibac All Purpose Cleaner Sds,

0 replies

Leave a Reply

Want to join the discussion?
Feel free to contribute!

Leave a Reply

Your email address will not be published. Required fields are marked *