➤ The PHP arithmetic operators are used with numeric values to perform common arithmetical operations. For instance:

$x = 100;
$y = 11;

• Addition (Sum of $x and $y)

echo $x + $y . "\n";

• Subtraction (Difference of $x and $y)

echo $x - $y . "\n";

• Multiplication (Product of $x and $y)

echo $x * $y . "\n";

• Division (Quotient of $x and $y)

echo $x / $y . "\n";

• Modulus (Remainder of $x divided by $y)

echo $x % $y . "\n";

• Exponentiation (Result of raising $x to the $y'th power)

echo $x ** $y . "\n";