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Computer Programming for Absolute Beginners

You're reading from  Computer Programming for Absolute Beginners

Product type Book
Published in Jul 2020
Publisher Packt
ISBN-13 9781839216862
Pages 430 pages
Edition 1st Edition
Languages
Author (1):
Joakim Wassberg Joakim Wassberg

Table of Contents (19) Chapters

Preface 1. Section 1: Introduction to Computer Programs and Computer Programming
2. Chapter 1: Introduction to Computer Programs 3. Chapter 2: Introduction to Programming Languages 4. Chapter 3: Types of Applications 5. Chapter 4: Software Projects and How We Organize Our Code 6. Section 2: Constructs of a Programming Language
7. Chapter 5: Sequence – The Basic Building Block of a Computer Program 8. Chapter 6: Working with Data – Variables 9. Chapter 7: Program Control Structures 10. Chapter 8: Understanding Functions 11. Chapter 9: When Things Go Wrong – Bugs and Exceptions 12. Chapter 10: Programming Paradigms 13. Chapter 11: Programming Tools and Methodologies 14. Section 3: Best Practices for Writing High-Quality Code
15. Chapter 12: Code Quality 16. Other Books You May Enjoy Appendix A: How to Translate the Pseudocode into Real Code 1. Appendix B: Dictionary

Understanding types of software bugs

There are many different ways we can classify bugs. Here, we will look at some common types, see what they are, and see what they can look like.

Arithmetic errors

Arithmetic bugs, as the name suggests, have to do with arithmetic operations. There are a few things we should look out for, as outlined in the following sections.

Division by zero

One such thing is division by zero. This is not only related to computers as we can also never perform a division where the divisor is zero. In mathematics, dividing by zero has no meaning, because if we do , we will get 3. If we multiply 3 and 2, we will get 6 back. But if we take , there is no number we can multiply by zero to get back to 6.

This might seem simple enough, but sometimes, it happens anyway, especially when we are working with variables.

Let's assume that we have two variables that get their value somewhere in our application, like this:

x = 3
y = 14

Later on in the...

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