Re^2: What does $::var means

[kprasanna_79]

gellyfish,

But whats difference between

my $var and $::var

i know one is the package variable and other is lexical one. but is there any diference between them functionally

-Prasanna.K

[gellyfish]

They are not the same variable. The lexical variable declared as my $var is only accessible within the scope within which it is defined, whereas the package variable $main::var is essentially accessible anywhere. The package variable appears in the global symbol table whereas the lexical variables have their own 'pad' so they occupy a different namespace.

/J\

[Hofmator]

For the difference between $var and $::var see the following code:

package Foo;
$var   = "hello\n";
$::var = "bye\n";

print $var;        # hello
print $Foo::var;   # hello
print $::var;      # bye
print $main::var;  # bye

package main;
print $var;        # bye     !!
print $Foo::var;   # hello
print $::var;      # bye
print $main::var;  # bye

So - as mentioned elsewhere - $::var is equivalent to $main::var while $var refers to the $var variable in the current package.