PHP program to find area of circle

  

PHP program to find Area of Circle

<?php
define ("pi","3.14");
$r=10;
$area=pi*$r*$r;
echo $area;
?>

Output: 314

UNIT-304
Elementary Server Side Scripting through PHP

1. PHP Introduction
2. How to save PHP page
3. PHP variables and their naming conventions
4. PHP program to find maximum of 5 numbers
5. PHP program to find minimum of 5 numbers
6. PHP program to find sum of 2 numbers
7. PHP program to find subtraction of 2 numbers