Book Image

Computer Programming for Absolute Beginners

By : Joakim Wassberg
4 (1)
Book Image

Computer Programming for Absolute Beginners

4 (1)
By: Joakim Wassberg

Overview of this book

Learning how to code has many advantages, and gaining the right programming skills can have a massive impact on what you can do with your current skill set and the way you advance in your career. This book will be your guide to learning computer programming easily, helping you overcome the difficulties in understanding the major constructs in any mainstream programming language. Computer Programming for Absolute Beginners starts by taking you through the building blocks of any programming language with thorough explanations and relevant examples in pseudocode. You'll understand the relationship between computer programs and programming languages and how code is executed on the computer. The book then focuses on the different types of applications that you can create with your programming knowledge. You'll delve into programming constructs, learning all about statements, operators, variables, and data types. As you advance, you'll see how to control the flow of your programs using control structures and reuse your code using functions. Finally, you'll explore best practices that will help you write code like a pro. By the end of this book, you'll be prepared to learn any programming language and take control of your career by adding coding to your skill set.
Table of Contents (19 chapters)
1
Section 1: Introduction to Computer Programs and Computer Programming
6
Section 2: Constructs of a Programming Language
7
Chapter 5: Sequence – The Basic Building Block of a Computer Program
14
Section 3: Best Practices for Writing High-Quality Code
Appendix B: Dictionary
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
R
S
T
U
V
W

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...