Area of Circle

core/function/area-of-circle/code/src/area-of-circle.php:

<?php
 // A = πr²

function areaOfCircle($radius)
{
  // TODO
}

core/function/area-of-circle/code/print/area-of-circle.print.php:

<?php
require __DIR__ . '/../src/area-of-circle.php';

// Circle Tools

// Area of the circle of radius 1 is of 3.1415926535898
var_dump(areaOfCircle(1));
var_dump(3.1415926535898);

// Area of the circle of radius 10 is of 314.15926535898
var_dump(areaOfCircle(10));
var_dump(314.15926535898);

Response