Computer Science With Python Language Made Simple Class Xi

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Computer Science With Python Language Made Simple

Author : Satish Jain/Shashi Singh
Publisher : BPB Publications
ISBN 13 : 9388176456
Total Pages : 598 pages
Book Rating : 4.3/5 (881 download)

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Book Synopsis Computer Science With Python Language Made Simple by : Satish Jain/Shashi Singh

Download or read book Computer Science With Python Language Made Simple written by Satish Jain/Shashi Singh and published by BPB Publications. This book was released on 2018-06-24 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: DescriptionThis book is designed to give you on insight of the art and science of Computers. the book does not ned any special background to comprehend the subject matter.The book covers the entire course contents of Computer Science with Python Language for Class XI prescribed by Central Board of Secondary Education (C.B.S.E.) according to new Syllabus 2018-2019 onwards) in a clear and simple English language. It discusses Programming and Computational Thinking. Computer Systems and Organisation Concepts in very comprehensive manner to build a strong foundation. The Programming methodology and Introduction to Python language are described in easy-to-understand language. Different topics such as Control structures, Strings, Lists, Dictionaries and Tuples are explained in a very easy to understand language. Programming with Python language is explained with maximum number of examples. It presents a detailed discussion of topics such as Database Concepts, SQL, Relational Algebra, MangoDB and CyberSafety.FeaturesAmple number of diagrams are used to illustrate the subject matter for easy understandingSolved Exercises are added at the end of each chapter so that the readers can evaluate their progress by comparing their answers with the answers given in the book.Summary and Glossary related to particular chapter are given at the end of each chapter.A Lab Exercise is added at the end of each chapter.Contents Unit-1 Programming and Computational Thinking Programming Concepts, Problem Solving Methodology and Techniques, Getting Started with Python, Data Types, Variables and Constants, Operators and Expressions, Flow of Control, Functions, String Manipulation, List Manipulation, Dictionaries , Tuples, Exception Handling and DebuggingUnit-2 Computer Systems and Organisation Basic Computer Organisation, Software Concepts, Data Representation, Boolean Algebra Unit-3 Database Management Database Management Concepts Unit-4 Society, Law and Ethics - Cyber Safety Society, Law and Ethics- Cyber SafetySummary, Glossary, Solved Exercise, AssignmentsProject Work, Sample Question Paper 1 & 2

Computer Science with Python Language Made Simple

Author : Satish Singh Shashi Jain
Publisher : Bpb Publication
ISBN 13 : 9789388176224
Total Pages : 600 pages
Book Rating : 4.1/5 (762 download)

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Book Synopsis Computer Science with Python Language Made Simple by : Satish Singh Shashi Jain

Download or read book Computer Science with Python Language Made Simple written by Satish Singh Shashi Jain and published by Bpb Publication. This book was released on 2018 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Python Programming

Author : John M. Zelle
Publisher : Franklin, Beedle & Associates, Inc.
ISBN 13 : 1887902996
Total Pages : 533 pages
Book Rating : 4.8/5 (879 download)

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Book Synopsis Python Programming by : John M. Zelle

Download or read book Python Programming written by John M. Zelle and published by Franklin, Beedle & Associates, Inc.. This book was released on 2004 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is suitable for use in a university-level first course in computing (CS1), as well as the increasingly popular course known as CS0. It is difficult for many students to master basic concepts in computer science and programming. A large portion of the confusion can be blamed on the complexity of the tools and materials that are traditionally used to teach CS1 and CS2. This textbook was written with a single overarching goal: to present the core concepts of computer science as simply as possible without being simplistic.

Practical Programming

Author : Paul Gries
Publisher : Pragmatic Bookshelf
ISBN 13 : 1680504126
Total Pages : 554 pages
Book Rating : 4.6/5 (85 download)

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Book Synopsis Practical Programming by : Paul Gries

Download or read book Practical Programming written by Paul Gries and published by Pragmatic Bookshelf. This book was released on 2017-12-06 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classroom-tested by tens of thousands of students, this new edition of the bestselling intro to programming book is for anyone who wants to understand computer science. Learn about design, algorithms, testing, and debugging. Discover the fundamentals of programming with Python 3.6--a language that's used in millions of devices. Write programs to solve real-world problems, and come away with everything you need to produce quality code. This edition has been updated to use the new language features in Python 3.6.

Oswaal CBSE Question Bank Class 11 Computer Science, Chapterwise and Topicwise Solved Papers For 2025 Exams

Author : Oswaal Editorial Board
Publisher : Oswaal Books
ISBN 13 : 9359582255
Total Pages : 241 pages
Book Rating : 4.3/5 (595 download)

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Book Synopsis Oswaal CBSE Question Bank Class 11 Computer Science, Chapterwise and Topicwise Solved Papers For 2025 Exams by : Oswaal Editorial Board

Download or read book Oswaal CBSE Question Bank Class 11 Computer Science, Chapterwise and Topicwise Solved Papers For 2025 Exams written by Oswaal Editorial Board and published by Oswaal Books. This book was released on 2024-02-03 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Description of the product: • 100% Updated Syllabus & Question Typologies: We have got you covered with the latest and 100% updated curriculum along with the latest typologies of Questions. • Timed Revision with Topic-wise Revision Notes & Smart Mind Maps: Study smart, not hard! • Extensive Practice with 1000+ Questions & SAS Questions (Sri Aurobindo Society): To give you 1000+ chances to become a champ! • Concept Clarity with 500+ Concepts & Concept Videos: For you to learn the cool way— with videos and mind-blowing concepts. • NEP 2020 Compliance with Competency-Based Questions & Artificial Intelligence: For you to be on the cutting edge of the coolest educational trends.

Python for Kids, 2nd Edition

Author : Jason R. Briggs
Publisher : No Starch Press
ISBN 13 : 1718503032
Total Pages : 365 pages
Book Rating : 4.7/5 (185 download)

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Book Synopsis Python for Kids, 2nd Edition by : Jason R. Briggs

Download or read book Python for Kids, 2nd Edition written by Jason R. Briggs and published by No Starch Press. This book was released on 2022-11-15 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of the best-selling Python for Kids—which brings you (and your parents) into the world of programming—has been completely updated to use the latest version of Python, along with tons of new projects! Python is a powerful programming language that’s easy to learn and fun to use! But books about programming in Python can be dull and that’s no fun for anyone. Python for Kids brings kids (and their parents) into the wonderful world of programming. Jason R. Briggs guides you through the basics, experimenting with unique (and hilarious) example programs featuring ravenous monsters, secret agents, thieving ravens, and more. New terms are defined; code is colored and explained; puzzles stretch the brain and strengthen understanding; and full-color illustrations keep you engaged throughout. By the end of the book, you’ll have programmed two games: a clone of the famous Pong, and “Mr. Stick Man Races for the Exit”—a platform game with jumps and animation. This second edition is revised and updated to reflect Python 3 programming practices. There are new puzzles to inspire you and two new appendices to guide you through Python’s built-in modules and troubleshooting your code. As you strike out on your programming adventure, you’ll learn how to: Use fundamental data structures like lists, tuples, and dictionaries Organize and reuse your code with functions and modules Use control structures like loops and conditional statements Draw shapes and patterns with Python’s turtle module Create games, animations, and other graphical wonders with tkinter Why should serious adults have all the fun? Python for Kids is your ticket into the amazing world of computer programming. Covers Python 3.x which runs on Windows, macOS, Linux, even Raspberry Pi

Python Tutorial 3.11.3

Author : Guido Van Rossum
Publisher :
ISBN 13 : 9781312571655
Total Pages : 0 pages
Book Rating : 4.5/5 (716 download)

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Book Synopsis Python Tutorial 3.11.3 by : Guido Van Rossum

Download or read book Python Tutorial 3.11.3 written by Guido Van Rossum and published by . This book was released on 2023-05-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Primer on Scientific Programming with Python

Author : Hans Petter Langtangen
Publisher : Springer
ISBN 13 : 3662498871
Total Pages : 942 pages
Book Rating : 4.6/5 (624 download)

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Book Synopsis A Primer on Scientific Programming with Python by : Hans Petter Langtangen

Download or read book A Primer on Scientific Programming with Python written by Hans Petter Langtangen and published by Springer. This book was released on 2016-07-28 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book serves as a first introduction to computer programming of scientific applications, using the high-level Python language. The exposition is example and problem-oriented, where the applications are taken from mathematics, numerical calculus, statistics, physics, biology and finance. The book teaches "Matlab-style" and procedural programming as well as object-oriented programming. High school mathematics is a required background and it is advantageous to study classical and numerical one-variable calculus in parallel with reading this book. Besides learning how to program computers, the reader will also learn how to solve mathematical problems, arising in various branches of science and engineering, with the aid of numerical methods and programming. By blending programming, mathematics and scientific applications, the book lays a solid foundation for practicing computational science. From the reviews: Langtangen ... does an excellent job of introducing programming as a set of skills in problem solving. He guides the reader into thinking properly about producing program logic and data structures for modeling real-world problems using objects and functions and embracing the object-oriented paradigm. ... Summing Up: Highly recommended. F. H. Wild III, Choice, Vol. 47 (8), April 2010 Those of us who have learned scientific programming in Python ‘on the streets’ could be a little jealous of students who have the opportunity to take a course out of Langtangen’s Primer.” John D. Cook, The Mathematical Association of America, September 2011 This book goes through Python in particular, and programming in general, via tasks that scientists will likely perform. It contains valuable information for students new to scientific computing and would be the perfect bridge between an introduction to programming and an advanced course on numerical methods or computational science. Alex Small, IEEE, CiSE Vol. 14 (2), March /April 2012 “This fourth edition is a wonderful, inclusive textbook that covers pretty much everything one needs to know to go from zero to fairly sophisticated scientific programming in Python...” Joan Horvath, Computing Reviews, March 2015

Python Basics

Author : Dan Bader
Publisher : Real Python (Realpython.Com)
ISBN 13 : 9781775093329
Total Pages : 636 pages
Book Rating : 4.0/5 (933 download)

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Book Synopsis Python Basics by : Dan Bader

Download or read book Python Basics written by Dan Bader and published by Real Python (Realpython.Com). This book was released on 2021-03-16 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Make the Leap From Beginner to Intermediate in Python... Python Basics: A Practical Introduction to Python 3 Your Complete Python Curriculum-With Exercises, Interactive Quizzes, and Sample Projects What should you learn about Python in the beginning to get a strong foundation? With Python Basics, you'll not only cover the core concepts you really need to know, but you'll also learn them in the most efficient order with the help of practical exercises and interactive quizzes. You'll know enough to be dangerous with Python, fast! Who Should Read This Book If you're new to Python, you'll get a practical, step-by-step roadmap on developing your foundational skills. You'll be introduced to each concept and language feature in a logical order. Every step in this curriculum is explained and illustrated with short, clear code samples. Our goal with this book is to educate, not to impress or intimidate. If you're familiar with some basic programming concepts, you'll get a clear and well-tested introduction to Python. This is a practical introduction to Python that jumps right into the meat and potatoes without sacrificing substance. If you have prior experience with languages like VBA, PowerShell, R, Perl, C, C++, C#, Java, or Swift the numerous exercises within each chapter will fast-track your progress. If you're a seasoned developer, you'll get a Python 3 crash course that brings you up to speed with modern Python programming. Mix and match the chapters that interest you the most and use the interactive quizzes and review exercises to check your learning progress as you go along. If you're a self-starter completely new to coding, you'll get practical and motivating examples. You'll begin by installing Python and setting up a coding environment on your computer from scratch, and then continue from there. We'll get you coding right away so that you become competent and knowledgeable enough to solve real-world problems, fast. Develop a passion for programming by solving interesting problems with Python every day! If you're looking to break into a coding or data-science career, you'll pick up the practical foundations with this book. We won't just dump a boat load of theoretical information on you so you can "sink or swim"-instead you'll learn from hands-on, practical examples one step at a time. Each concept is broken down for you so you'll always know what you can do with it in practical terms. If you're interested in teaching others "how to Python," this will be your guidebook. If you're looking to stoke the coding flame in your coworkers, kids, or relatives-use our material to teach them. All the sequencing has been done for you so you'll always know what to cover next and how to explain it. What Python Developers Say About The Book: "Go forth and learn this amazing language using this great book." - Michael Kennedy, Talk Python "The wording is casual, easy to understand, and makes the information flow well." - Thomas Wong, Pythonista "I floundered for a long time trying to teach myself. I slogged through dozens of incomplete online tutorials. I snoozed through hours of boring screencasts. I gave up on countless crufty books from big-time publishers. And then I found Real Python. The easy-to-follow, step-by-step instructions break the big concepts down into bite-sized chunks written in plain English. The authors never forget their audience and are consistently thorough and detailed in their explanations. I'm up and running now, but I constantly refer to the material for guidance." - Jared Nielsen, Pythonista

Elements of Programming Interviews

Author : Adnan Aziz
Publisher : EPI
ISBN 13 : 1479274836
Total Pages : 530 pages
Book Rating : 4.4/5 (792 download)

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Book Synopsis Elements of Programming Interviews by : Adnan Aziz

Download or read book Elements of Programming Interviews written by Adnan Aziz and published by EPI. This book was released on 2012 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: The core of EPI is a collection of over 300 problems with detailed solutions, including 100 figures, 250 tested programs, and 150 variants. The problems are representative of questions asked at the leading software companies. The book begins with a summary of the nontechnical aspects of interviewing, such as common mistakes, strategies for a great interview, perspectives from the other side of the table, tips on negotiating the best offer, and a guide to the best ways to use EPI. The technical core of EPI is a sequence of chapters on basic and advanced data structures, searching, sorting, broad algorithmic principles, concurrency, and system design. Each chapter consists of a brief review, followed by a broad and thought-provoking series of problems. We include a summary of data structure, algorithm, and problem solving patterns.

Invent Your Own Computer Games with Python, 4th Edition

Author : Al Sweigart
Publisher : No Starch Press
ISBN 13 : 1593277954
Total Pages : 377 pages
Book Rating : 4.5/5 (932 download)

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Book Synopsis Invent Your Own Computer Games with Python, 4th Edition by : Al Sweigart

Download or read book Invent Your Own Computer Games with Python, 4th Edition written by Al Sweigart and published by No Starch Press. This book was released on 2016-12-16 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invent Your Own Computer Games with Python will teach you how to make computer games using the popular Python programming language—even if you’ve never programmed before! Begin by building classic games like Hangman, Guess the Number, and Tic-Tac-Toe, and then work your way up to more advanced games, like a text-based treasure hunting game and an animated collision-dodging game with sound effects. Along the way, you’ll learn key programming and math concepts that will help you take your game programming to the next level. Learn how to: –Combine loops, variables, and flow control statements into real working programs –Choose the right data structures for the job, such as lists, dictionaries, and tuples –Add graphics and animation to your games with the pygame module –Handle keyboard and mouse input –Program simple artificial intelligence so you can play against the computer –Use cryptography to convert text messages into secret code –Debug your programs and find common errors As you work through each game, you’ll build a solid foundation in Python and an understanding of computer science fundamentals. What new game will you create with the power of Python? The projects in this book are compatible with Python 3.

Computer Science with Python

Author : Reeta Sahoo, Gagan Sahoo
Publisher : New Saraswati House India Pvt Ltd
ISBN 13 : 9351999807
Total Pages : 458 pages
Book Rating : 4.3/5 (519 download)

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Book Synopsis Computer Science with Python by : Reeta Sahoo, Gagan Sahoo

Download or read book Computer Science with Python written by Reeta Sahoo, Gagan Sahoo and published by New Saraswati House India Pvt Ltd. This book was released on with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of Book of Computers . The ebook version does not contain CD.

TEXTBOOK OF COMPUTER SCIENCE FOR CLASS XI

Author : SEEMA BHATNAGAR
Publisher : PHI Learning Pvt. Ltd.
ISBN 13 : 9788120329935
Total Pages : 608 pages
Book Rating : 4.3/5 (299 download)

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Book Synopsis TEXTBOOK OF COMPUTER SCIENCE FOR CLASS XI by : SEEMA BHATNAGAR

Download or read book TEXTBOOK OF COMPUTER SCIENCE FOR CLASS XI written by SEEMA BHATNAGAR and published by PHI Learning Pvt. Ltd.. This book was released on 2008-08-19 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook, presented in a clear and friendly writing style, provides students of Class XI with a thorough introduction to the discipline of computer science. It offers accurate and balanced coverage of all the computer science topics as prescribed in the CBSE syllabus Code 083. Assuming no previous knowledge of computer science, this book discusses key computing concepts to provide invaluable insight into how computers work. It prepares students for the world of computing by giving them a solid foundation in programming concepts, operating systems, problem solving methodology, C++ programming language, data representation, and computer hardware. KEY FEATURES • Explains theory in user friendly and easy-to-approach style • Teaches C++ from scratch; knowledge of C is not needed • Provides Programming Examples • Gives Practical Exercise • Provides Answers to Short Questions • Gives Practice Questions at the end of each chapter • Suitable for Self-Study

Oswaal CBSE Sample Question Papers Class 11 Computer Science (For 2025 Exam)

Author : Oswaal Editorial Board
Publisher : Oswaal Books
ISBN 13 : 9362396815
Total Pages : 113 pages
Book Rating : 4.3/5 (623 download)

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Book Synopsis Oswaal CBSE Sample Question Papers Class 11 Computer Science (For 2025 Exam) by : Oswaal Editorial Board

Download or read book Oswaal CBSE Sample Question Papers Class 11 Computer Science (For 2025 Exam) written by Oswaal Editorial Board and published by Oswaal Books. This book was released on 2024-07-29 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oswaal CBSE Sample Question Papers Class 9 English Language and Literature Book (For 2025 Exam)

Cambridge IGCSE® and O Level Computer Science Programming Book for Python

Author : Chris Roffey
Publisher : Cambridge University Press
ISBN 13 : 1316617823
Total Pages : 209 pages
Book Rating : 4.3/5 (166 download)

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Book Synopsis Cambridge IGCSE® and O Level Computer Science Programming Book for Python by : Chris Roffey

Download or read book Cambridge IGCSE® and O Level Computer Science Programming Book for Python written by Chris Roffey and published by Cambridge University Press. This book was released on 2017-02-02 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: This resource is written to follow the updated Cambridge IGCSE® Computer Science syllabus 0478 with examination from June and November 2016. Cambridge IGCSE® and O Level Computer Science Programming Book for Python accompanies the Cambridge IGCSE and O Level Computer Science coursebook, and is suitable for students and teachers wishing to use Python in their studies. It introduces and develops practical skills to guide students in developing coding solutions to the tasks presented in the book. Starting from simple skills and progressing to more complex challenges, this book shows how to approach a coding problem using Structure Diagrams and Flow Charts, explains programming logic using pseudocode, develops Python programming skills and gives full solutions to the tasks set.

Get Programming

Author : Ana Bell
Publisher : Simon and Schuster
ISBN 13 : 1638355924
Total Pages : 668 pages
Book Rating : 4.6/5 (383 download)

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Book Synopsis Get Programming by : Ana Bell

Download or read book Get Programming written by Ana Bell and published by Simon and Schuster. This book was released on 2018-03-27 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get Programming: Learn to code with Python teaches you the basics of computer programming using the Python language. In this exercise-driven book, you'll be doing something on nearly every page as you work through 38 compact lessons and 7 engaging capstone projects. By exploring the crystal-clear illustrations, exercises that check your understanding as you go, and tips for what to try next, you'll start thinking like a programmer in no time. This book works perfectly alongside our video course Get Programming with Python in Motion, available exclusively at Manning.com: www.manning.com/livevideo/get-programming-with-python-in-motion Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. What's Inside Programming skills you can use in any language Learn to code—no experience required Learn Python, the language for beginners Dozens of exercises and examples help you learn by doing About the Reader No prior programming experience needed. Table of Contents LEARNING HOW TO PROGRAM Lesson 1 - Why should you learn how to program? Lesson 2 - Basic principles of learning a programming language UNIT 1 - VARIABLES, TYPES, EXPRESSIONS, AND STATEMENTS Lesson 3 - Introducing Python: a programming language Lesson 4 - Variables and expressions: giving names and values to things Lesson 5 - Object types and statements of code 46 Lesson 6 - Capstone project: your first Python program-convert hours to minutes UNIT 2 - STRINGS, TUPLES, AND INTERACTING WITH THE USER Lesson 7 - Introducing string objects: sequences of characters Lesson 8 - Advanced string operations Lesson 9 - Simple error messages Lesson 10 - Tuple objects: sequences of any kind of object Lesson 11 - Interacting with the user Lesson 12 - Capstone project: name mashup UNIT 3 - MAKING DECISIONS IN YOUR PROGRAMS Lesson 13 - Introducing decisions in programs Lesson 14 - Making more-complicated decisions Lesson 15 - Capstone project: choose your own adventure UNIT 4 - REPEATING TASKS Lesson 16 - Repeating tasks with loops Lesson 17 - Customizing loops Lesson 18 - Repeating tasks while conditions hold Lesson 19 - Capstone project: Scrabble, Art Edition UNIT 5 - ORGANIZING YOUR CODE INTO REUSABLE BLOCKS Lesson 20 - Building programs to last Lesson 21 - Achieving modularity and abstraction with functions Lesson 22 - Advanced operations with functions Lesson 23 - Capstone project: analyze your friends UNIT 6 - WORKING WITH MUTABLE DATA TYPES Lesson 24 - Mutable and immutable objects Lesson 25 - Working with lists Lesson 26 - Advanced operations with lists Lesson 27 - Dictionaries as maps between objects Lesson 28 - Aliasing and copying lists and dictionaries Lesson 29 - Capstone project: document similarity UNIT 7 - MAKING YOUR OWN OBJECT TYPES BY USING OBJECT-ORIENTED PROGRAMMING Lesson 30 - Making your own object types Lesson 31 - Creating a class for an object type Lesson 32 - Working with your own object types Lesson 33 - Customizing classes Lesson 34 - Capstone project: card game UNIT 8 - USING LIBRARIES TO ENHANCE YOUR PROGRAMS Lesson 35 - Useful libraries Lesson 36 - Testing and debugging your programs Lesson 37 - A library for graphical user interfaces Lesson 38 - Capstone project: game of tag Appendix A - Answers to lesson exercises Appendix B - Python cheat sheet Appendix C - Interesting Python libraries

HT THINK LIKE A COMPUTER SCIEN

Author : Jeffrey Elkner
Publisher : Samurai Media Limited
ISBN 13 : 9789888406784
Total Pages : 306 pages
Book Rating : 4.4/5 (67 download)

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Book Synopsis HT THINK LIKE A COMPUTER SCIEN by : Jeffrey Elkner

Download or read book HT THINK LIKE A COMPUTER SCIEN written by Jeffrey Elkner and published by Samurai Media Limited. This book was released on 2016-10-04 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this book is to teach you to think like a computer scientist. This way of thinking combines some of the best features of mathematics, engineering, and natural science. Like mathematicians, computer scientists use formal languages to denote ideas (specifically computations). Like engineers, they design things, assembling components into systems and evaluating tradeoffs among alternatives. Like scientists, they observe the behavior of complex systems, form hypotheses, and test predictions. The single most important skill for a computer scientist is problem solving. Problem solving means the ability to formulate problems, think creatively about solutions, and express a solution clearly and accurately. As it turns out, the process of learning to program is an excellent opportunity to practice problem-solving skills. That's why this chapter is called, The way of the program. On one level, you will be learning to program, a useful skill by itself. On another level, you will use programming as a means to an end. As we go along, that end will become clearer.