Arithmetic operators in PHP

In PHP, the arithmetic operators works same as other programming languages simply like as $c=$a + $b (c is the sum of the a and b).
In the following example we will perform some arithmetic operations, see the following example:

<? Php
$num1 = 5;
$num2 = 15;
$num3 = 4;
$num4 = 4;
 
$TotalSum = $num1 + $num2 + $num3 + $num4;
$AvgNum = ($num1 + $num2 + $num3 + $num4)/4;
Echo “the sum of the numbers is : $TotalSum “;
Echo “the average of the numbers is : $AvgNum”;
?>

Output will be above program is:
the sum of the numbers is 28
the average of the numbers is : 7