diff --git a/Chapter8-Strings, Symbols and other scalar objects/symbols.rb b/Chapter8-Strings, Symbols and other scalar objects/symbols.rb
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+++ b/Chapter8-Strings, Symbols and other scalar objects/symbols.rb	
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+# Symbols are immutable and unique.
+
+# When you asign a value to a variable 
+# or constant or create a mothod or 
+# class, the identifier goes to the Ruby's
+# internal symbol table.
+
+# symbols don't differ in any way from 
+# immutable strings EXCEPT the object_id 
+# stays static.
+
+>> class Dog  
+>>   def initialize(breed, name)  
+>>     # Instance variables  
+>>     @breed = breed  
+>>     @name = name  
+>>   end  
+>>   
+>>   def bark  
+>>     puts 'Ruff! Ruff!'  
+>>   end  
+>>   
+>>   def display  
+>>     puts "I am of #{@breed} breed and my name is #{@name}"  
+>>   end  
+>> end  
+=> :display
+
+>> d = Dog.new('Labrador', 'jounior')
+=> #<Dog:0x0055870a9d3fa0 @breed="Labrador", @name="junior">
+
+>> d.method(:display).call
+I am of Labrador breed and my name is junior
+=> nil
+