What are some examples of variable scope in Perl?

What are some examples of variable scope in Perl?

In Perl, variable scope refers to the visibility of variables in different parts of your code. For example, a variable declared with 'my' is scoped to the block in which it is defined.

Can you give me a specific example of lexical scope?

Sure! Here's an example:

sub example {
    my $x = 10;  # $x is lexically scoped to this subroutine
    if (1) {
        my $y = 20;  # $y is scoped to this block
        print $x + $y;  # This will print 30
    }
    print $y;  # This will cause an error because $y is not visible here
}

What about global variables? How do they work?

Global variables in Perl are declared using 'our' or by simply declaring them outside of any subroutine. They can be accessed from anywhere in the program.

Can you show me an example of a global variable?

Certainly! Here's an example:

our $global_var = 5;  # This is a global variable

sub test {
    print $global_var;  # This will print 5
}