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#!usr/bin/perl
use strict;
...
Value of <HANDLE> construct can be "0"; test with defined() at C:\User
+s\mmtho\Documents\PerlProjects\Monks\test_myVar_inwhile.pl line 5.
Global symbol "$line" requires explicit package name (did you forget t
+o declare "my $line"?) at C:\Users\mmtho\Documents\PerlProjects\Monks
+\test_myVar_inwhile.pl line 5.
Execution of C:\Users\mmtho\Documents\PerlProjects\Monks\test_myVar_in
+while.pl aborted due to compilation errors.

#!usr/bin/perl
use strict;
...
__END__
Global symbol "$line" requires explicit package name (did you forget t
+o declare "my $line"?) at C:\Users\mmtho\Documents\PerlProjects\Monks
+\test_myVar_inwhile_ver2.pl line 6.
Execution of C:\Users\mmtho\Documents\PerlProjects\Monks\test_myVar_in
+while_ver2.pl aborted due to compilation errors.

#!usr/bin/perl
use strict;
...
Value of <HANDLE> construct can be "0"; test with defined() at C:\User
+s\mmtho\Documents\PerlProjects\Monks\test_myVar_inwhile_ver2.pl line 
+7.
do somehing with non blank line
do somehing with non blank line

#!usr/bin/perl
use strict;
...
do somehing with non blank line
do somehing with non blank line
do somehing with non blank line