in reply to does perl have a concept of "int main()"? (variable scoping question)

> In perl, it seems that all variables are visible to all functions by default, i.e. they have global scope.

nope Perl is not Python, it has lexically scoped variables.

Use my $var to declare pricate variables which are limited to the block-scope resp. the filescope at maximum.

Use our $var to declare variables in the local package which could be accessed from other namespaces by full declaration like $package::var.

Cheers Rolf

( addicted to the Perl Programming Language)

PS: see also this code example

In Section Seekers of Perl Wisdom