Operator supported by PHP:

Arithmetic Operator:

“-” Is used for both negation and subtraction. + for addition. * for multiplication and / for a division.
“%” is used for modulus operator used to find the remainder in division.
** is exponentiation operator. Value on the left to the power value in right.

$a = 10;
$b = 5;

echo -$a. '<br>';
echo $a + $b.'<br>';
echo $a - $b.'<br>';
echo $a * $b.'<br>';
echo $a / $b.'<br>';
echo $a % $b.'<br>';

$a = 10;

$b = 5;

echo -$a. ' ';

echo $a + $b.' ';

echo $a - $b.' ';

echo $a * $b.' ';

echo $a / $b.' ';

echo $a % $b.' ';