This HPH script shows the use of MATH Operators.
";
$sum = $sum + 5;
echo "sum +5 = ". $sum . "
";
$sum = $sum % 2;
echo "sum = sum % 2: Remainder = " . $sum . "
";
$answer = 5;
echo "num = 5";
$answer += 2;
echo "num +=2 = " . $answer ."
";
$answer *= 2;
echo "num *=2 = " . $answer ."
";
$answer ++;
echo "num++ = " . $answer ."
";
$answer --;
echo "num-- = " . $answer ."
";
?>