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$ perl -Mstrict -E'$hello = "Hi"; say $hello'
Global symbol "$hello" requires explicit package name at -e line 1.
Global symbol "$hello" requires explicit package name at -e line 1.
Execution of -e aborted due to compilation errors.

$ perl -Mstrict -E'my $hello = "Hi"; say $hello'
Hi
$ perl -Mstrict -E'our $hello = "Hi"; say $hello'
Hi

$ perl -Mstrict -E'$World::hello = "Hi"; say $World::hello'
Hi

$ perl -Mstrict -E'no strict qw(vars); $hello = "Hi"; say $hello'
Hi