Gain insights into Ruby development with 78 tasks tailored for beginners and experienced coders. Explore object-oriented concepts, debug programs, and advance your freelance coding career.

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This self-study course written as a book is your first step towards making money by coding and programming from home, and having fun doing it. You will understand how the Ruby language works, and establish a foundation for being a successful freelance developer. This course gives you not only technical detail, but presents knowledge in a friendly format, understandable by all ages, providing a thorough explanation of modern concepts for absolute beginners.

In this course you will find 78 easy to follow tasks, so even people without any programming skill can solve them. Beginners will learn how to create, debug, and understand programs in Ruby. Those who are already familiar with the language will rediscover object-oriented concepts, memory organization, find career advice, and save the planet from a nuclear apocalypse.

Ready to dive into one of the most influential and demanding third generation programming languages? Let's tune in!

The Handbook for Ruby Developers

# Purpose of methods
Methods, or functions, are small chunks of code that we can reuse. Until now, we haven’t reused the code that we wrote, except for the code inside of blocks. But with methods, we can improve and optimize our programs by splitting them into multiple logical blocks.


Methods shouldn’t necessarily make our programs shorter. The main idea is to define the logical parts and make the program more readable for a human. Sometimes, this process is called **refactoring**. There are many refactoring techniques, and this particular technique is called the **extract method**. The result of this refactoring is logical blocks of code that are extracted into one or more methods, so that the code can be reused later.

We can also introduce methods for our own convenience. Remember how we used the following code to convert user input to a number?

```ruby
age = gets.to_i
```

The code given above gets the user input and converts it from a string to an integer with `.to_i` and saves the result to the `age` variable. This expression isn’t self-explanatory for someone who sees the code for the first time. Let’s improve it a little, so that it becomes easier to understand:

Learn about methods and how to use them in Ruby.


Before We Begin

First Steps

Fundamentals of Ruby

Conditional Statements

Operators and Methods

Arrays

Hash

Fun with Object Oriented Programming

Debugging in Ruby

Ruby Version Manager

Testing Ruby Programs

Wrap Up!

Appendix

Methods

Purpose of methods