Variables Variable Types

 

• Variable names consists of numbers, letters and underscores, but they should not start with a number
• Perl is case sensitive, so $a and $A are different.
• Data of any type may be stored within three basic types of variables
  • Scalar
  • Array
  • Associative array (hash table)
• Variables are always preceded by a "dereferencing symbol" when either assigning or fetching values
• The dereferencing symbol is what you use to tell Perl which kind of variable type to use to hold your data