Book Image

Comprehensive Ruby Programming

By : Jordan Hudgens
Book Image

Comprehensive Ruby Programming

By: Jordan Hudgens

Overview of this book

Ruby is a powerful, general-purpose programming language that can be applied to any task. Whether you are an experienced developer who wants to learn a new language or you are new to programming, this book is your comprehensive Ruby coding guide. Starting with the foundational principles, such as syntax, and scaling up to advanced topics such as big data analysis, this book will give you all of the tools you need to be a professional Ruby developer. A few of the key topics are: object-oriented programming, built-in Ruby methods, core programming skills, and an introduction to the Ruby on Rails and Sinatra web frameworks. You will also build 10 practical Ruby programs. Created by an experienced Ruby developer, this book has been written to ensure it focuses on the skills you will need to be a professional Ruby developer. After you have read this book, you will be ready to start building real-world Ruby projects.
Table of Contents (20 chapters)

Difference between integers and floats

Ruby has a few different data types for working with numbers. Two of the primary options are integer and float. In this section, we're going to walk through the difference between the two data types and how they can affect your program. In the previous section, Arithmetic order of operations, you saw a little bit of strange behavior when it came to division. I'm going to bring up the same example. In the code, the division equation, 2 / 216 was treated as 0. We know this is obviously not true, so why did Ruby return this value?

When it saw the values 2 and 216, it treated them as integers. So, it assumed that the user would want a rounded value, so it rounded it to the nearest whole number, which is 0 in this case.

To get the correct answer, we'll need to convert it into a decimal, which will automatically give us a float data...