use strict;
use warnings;
{
    my( $x , $y ) ;
    print 'scalar( ($x, $y ) )                  ', scalar( ($x, $y ) )
+, "\n";
    print 'scalar( ($x, $y ) ) = ()             ', scalar( ($x, $y ) =
+ () ), "\n";
    print 'scalar( ($x, $y ) ) = (undef)        ', scalar( ($x, $y ) =
+ (undef) ), "\n";
    print 'scalar( ($x, $y ) ) = (undef,undef)  ', scalar( ($x, $y ) =
+ (undef,undef) ), "\n";
    print 'scalar( ($x, $y ) ) = (0)            ', scalar( ($x, $y ) =
+ (0) ), "\n";
    print 'scalar( ($x, $y ) ) = (0,0)          ', scalar( ($x, $y ) =
+ (0,0) ), "\n";
    print 'scalar( ($x, $y ) ) = (1,0)          ', scalar( ($x, $y ) =
+ (1,0) ), "\n";
    print 'scalar( ($x, $y ) ) = (1,1)          ', scalar( ($x, $y ) =
+ (1,1) ), "\n";
    print 'scalar( ($x, $y ) ) = (1,1,1)        ', scalar( ($x, $y ) =
+ (1,1,1) ), "\n";
    print "\n\n";
}
__END__
Useless use of private variable in void context at - line 5.
Use of uninitialized value $y in print at - line 5.
scalar( ($x, $y ) )                  
scalar( ($x, $y ) ) = ()             0
scalar( ($x, $y ) ) = (undef)        1
scalar( ($x, $y ) ) = (undef,undef)  2
scalar( ($x, $y ) ) = (0)            1
scalar( ($x, $y ) ) = (0,0)          2
scalar( ($x, $y ) ) = (1,0)          2
scalar( ($x, $y ) ) = (1,1)          2
scalar( ($x, $y ) ) = (1,1,1)        3
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