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$_ the default variable of Perl
Detect recursion using state variables
Package variables and Lexical variables in Perl
Static and state variables in Perl
Variable declaration in Perl
Scalar variables
Variable "..." will not stay shared ...
Constants and read-only variables in Perl
"my" variable masks earlier declaration in same scope
Scalar values and variables - video
Scope of Variables - video
Scope of variables in Perl
ref - What kind of reference is this variable?
Useless use of private variable in void context
Variable number of parameters in Perl subroutines
How much memory do Perl variables use?
Variable names
Variable interpolation - User Input and Output - chomp - video
Exercise: parse variable width fields - video
Solution: parse variable width fields - video