What is meant by lexical variable ? I understand all "my" variables are lexical variables. Is it a local variable ? But most of the times I see my variables declared in the beginning of the code. If its a local variable then it shd be in some subroutine. What happens if we declare variables without "my" where its declared with "my" ? I read that package variables are different from lexical variables, are there variables declared in package ? If I declare a variable and assign it some value. Now this variable happens to be in package also, will not the variable declared is program take precedence over the one in package ? 
 
my $iwhome  = TeamSite::Config::iwgethome();
my $iwmount = TeamSite::Config::iwgetmount();

($iwcfg) = "$iwhome/bin/iwconfig";

my $dcrpath = iwpt_get_dcr_name();
$dcrpath   =~ s#\.iwmnt#iwmnt#g;
my $dcr_name = iwpt_get_dcr_name("basename");

my $prefix    = getLOB($dcrpath);
my $prefDir   = uc($prefix);
my $templatename = getDataType($dcrpath);
my $contentname  = $dcr_name;
$PackageVar = 23;

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If I use PackageVar in a code with value of 23, which has a vlue of 53 in package , which value will be assigned to PackageVar ?
Now when PackageVar variable is declared in package and I want the one declared in code take precedence in execution, what shall I do ? Shall I use "my" for that ?
If the variable declatred in code takes precedence over ones in package, then why do we need "my" ? Can we just not declare variables without "my" ?
Pls exlain in simple terms

In reply to lexical variable by manishrathi

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