I have two programs: program #1

#!/usr/bin/perl
use strict;
$a = "hi\n";
print $a;
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program #2

#!/usr/bin/perl
use strict;
$i = 5;
print "The value is $i.\n";
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Why does program #2 give me an error (when I don't use "my"):

Global symbol "$i" requires explicit package name at ./test-strict.pl line 4.
Global symbol "$i" requires explicit package name at ./test-strict.pl line 5.
Execution of ./test-strict.pl aborted due to compilation errors.

yet #1 doesn't? I'm very well aware that using strict requires you to declare your variables with "my". Yet I didn't use the word "my" on #1 and it worked fine.