Scalar Variables and Operators

Scalar Variables

• Up to this point we have been looking only at Literals . Certainly important, but of limited utility for a dynamic program.
• A Perl Variable , like variables in other languages, is simply a symbolic representation of a storage location to be manipulated.
• Perl scalar variables begin with a $ symbol, followed with a letter, followed by more letters, digits, or underscores. Variable names are case sensitive.
• Example: $Hello_There
• Example: $All4One
• Example: $x
• Remember Perl does not care if it is a numeric scalar, or a string scalar. This is very unusual compared to other languages, and it is remarkable how few problems it creates, and how many problems it solves.