use v5.20;use IO::Handle with 5.14 and above, IO::Handle is explicitly loaded
open my $fh, '>', 'io_handle.txt';
$fh->print("test file hanldle");
$fh->close;
my $fh_file = IO::File->new("io_handle.txt", "r");TODO: learn r,w,a
r+, w+, a+
if (defined $fh_file) {
say "great";
print <$fh_file>;
undef $fh_file; # automatically closes the file
}