how to run ruby classes

To run Ruby classes, follow these steps:

Create a Ruby file: Start by creating a new file with a .rb extension. This file will contain your Ruby code, including the class definition and any other code you want to execute.
Define the class: Inside the Ruby file, define your class using the class keyword, followed by the name of the class. For example, if you want to create a class called Person, you would write:

ruby class Person # Class code goes here end

Add methods and attributes: Within the class definition, you can add methods and attributes that define the behavior and properties of the class. Methods are defined using the def keyword, followed by the method name and any parameters. Attributes can be defined using instance variables (prefixed with @) and accessor methods (using attr_accessor, attr_reader, or attr_writer).

```ruby class Person attr_accessor :name, :age

 def initialize(name, age)
   @name = name
   @age = age
 end

 def greet
   puts "Hello, my name is #{@name} and I'm #{@age} years old."
 end

end ```

Create an instance: To use the class, you need to create an instance of it. This is done by calling the new method on the class and assigning it to a variable. You can then access the methods and attributes of the instance using dot notation.

ruby person = Person.new("John", 30) person.greet

Output: Hello, my name is John and I'm 30 years old.

In this example, we create a new instance of the Person class with the name "John" and age 30. We then call the greet method on the instance, which prints a greeting message.

Run the Ruby file: To run the Ruby file, you can use the ruby command followed by the name of the file. For example, if your file is named main.rb, you would run:

ruby main.rb

This will execute the Ruby code in the file and produce any output or side effects.

That's it! You have successfully created and run a Ruby class. Remember to save your Ruby file before running it. Let me know if you have any further questions.