Closures

• Closures capture lexical variables

 sub make_function {
 my $val = shift;
 return sub { print "Value is $val.\n"; ++$val };
 }

 my $f1 = make_function(3);
 my $f2 = make_function(20);

• Code is shared, pads separate

• Pad memory allocated and reclaimed at run time as usual