Ruby instance variabnl get
To access an instance variable in Ruby, you can use the @ symbol followed by the variable name. Here are the steps to access an instance variable in Ruby:
- Define an instance variable: First, you need to define an instance variable within a class or an object. Instance variables in Ruby are preceded by the
@symbol. For example, let's say we have a class calledPersonand we want to define an instance variable called@name. We can define it like this:
ruby
class Person
def initialize(name)
@name = name
end
end
In this example, the @name instance variable is set in the initialize method, which is a special method that gets called when a new object is created from the Person class.
- Access the instance variable: Once the instance variable is defined, you can access its value using the
@symbol followed by the variable name. In Ruby, instance variables are accessible within the instance methods of a class. For example, if we have a method calledget_namein thePersonclass, we can access the@nameinstance variable like this:
```ruby class Person def initialize(name) @name = name end
def get_name
@name
end
end ```
In this example, the get_name method returns the value of the @name instance variable.
- Create an object and call the method: To access the instance variable, you need to create an object of the class and call the method that accesses the instance variable. Here's an example:
ruby
person = Person.new("John")
puts person.get_name
In this example, we create a new Person object with the name "John" and then call the get_name method to retrieve the value of the @name instance variable. The output will be "John".
This is how you can access an instance variable in Ruby. By defining instance variables within a class and accessing them through instance methods, you can store and retrieve data unique to each object.