Example four - some scalar operations
#Example four - some interesting scalar operators.
# by Al Bento
$a = "this is example";
$b = 4;
$c = 3;
$d = 1;
++$c; # equivalent to $c = $c + 1
$e = !$d; # it will create the null, empty value.
$f = $e + 0;
$g = " of concatenation";
$h = $a.$g;
# printing the variables.
print "$a number $b, the new value of c is also $c\n";
print "example of logical operators: $d, $e, and $f\n";
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