What are some examples of scope in Ruby?

What are some examples of scope in Ruby?

In Ruby, scope refers to the visibility of variables. For example, a variable defined inside a method is not accessible outside of it.

Can you give me a specific example of local scope?

Sure! Here's an example:

def my_method
  local_var = 'I am local'
  puts local_var
end

my_method
puts local_var # This will raise an error!

What about instance variables?

Instance variables are prefixed with '@'. They are accessible within instance methods of the class. For example:

class MyClass
  def initialize
    @instance_var = 'I am an instance variable'
  end

  def show_var
    puts @instance_var
  end
end

obj = MyClass.new
obj.show_var

How does global scope work in Ruby?

Global variables are prefixed with '$'. They can be accessed from anywhere in the program. For example:

$global_var = 'I am global'

def show_global
  puts $global_var
end

show_global