Variables

• This is the place in memory where we can store some type of information.
• These are concerned with the storage of data. 
• Every variable has name & type 
• Syntax:

       <data type>  <identifier name>

• Example:

         int Id;
         string Name; 

Note:

• Variable name cannot be declared same as c# keywords
• If we want to use that then we need to add prefix it with @ character as
  int @new = 100;