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