$a = false;
$b = true;

print "Value of \$a = $a and value of \$b = $b\n";

$c = ($a and $b);
print "Value of \$a and \$b = $c\n";

$c = ($a  && $b);
print "Value of \$a && \$b = $c\n";

$c = ($a or $b);
print "Value of \$a or \$b = $c\n";

$c = ($a || $b);
print "Value of \$a || \$b = $c\n";

$a = 0;
$c = not($a);
print "Value of not(\$a)= $c\n";

***Result***

Value of $a = false and value of $b = true
Value of $a and $b = true
Value of $a && $b = true
Value of $a or $b = false
Value of $a || $b = false
Value of not($a)= 1