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Comprehensive Ruby Programming

You're reading from   Comprehensive Ruby Programming From beginner to confident programmer

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781787280649
Length 330 pages
Edition 1st Edition
Languages
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Author (1):
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Jordan Hudgens Jordan Hudgens
Author Profile Icon Jordan Hudgens
Jordan Hudgens
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Table of Contents (20) Chapters Close

Preface 1. Introduction to the Ruby Programming Language 2. Ruby Variables FREE CHAPTER 3. Ruby Strings 4. Working with Numbers in Ruby 5. Ruby Methods 6. Ruby Iterators and Loops 7. Ruby Collections 8. Ruby Conditionals 9. Object-Oriented Programming in Ruby 10. Working with the Filesystem in Ruby 11. Error Handling in Ruby 12. Regular Expressions in Ruby 13. Searching with grep in Ruby 14. Ruby Gems 15. Ruby Metaprogramming 16. Ruby Web Frameworks 17. Working with APIs in Ruby 18. Ruby Algorithms 19. Machine Learning

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...

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