sub diag {
my $x = shift @_;
my $y = shift @_;

my $x_sq = $x * $x;
my $y_sq = $y * $y;
my $prod = $x_sq + $y_sq;
my $result = sqrt($prod);
return $result;
}

##</code><code>##

sub diag {
return sqrt( $_[0] * $_[0] + $_[1] * $_[1]);
}