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$_ the default variable of Perl
Variable interpolation - User Input and Output - chomp - video
Exercise: parse variable width fields - video
Scalar values and variables - video
Scalar variables
Scope of Variables - video
Solution: parse variable width fields - video
How much memory do Perl variables use?
ref - What kind of reference is this variable?
Package variables and Lexical variables in Perl
Variable declaration in Perl
Detect recursion using state variables
Variable number of parameters in Perl subroutines
Constants and read-only variables in Perl
$a - $b - Special variables when using sort(). Don't use them for anything else besides your sort function!
Variable "..." will not stay shared ...
Static and state variables in Perl
Useless use of private variable in void context
Variable names
"my" variable masks earlier declaration in same scope