find the volume of a cylinder in php

main.php
<?php
$radius = 5; //radius of the cylinder
$height = 10; //height of the cylinder

$volume = pi() * pow($radius, 2) * $height;

echo "The volume of the cylinder is " . $volume . " cubic units.";

?>
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10 lines

Explanation:

• The formula for the volume of a cylinder is V = πr²h, where r is the radius of the circular base and h is the height of the cylinder.
• In the above code, we have defined the radius and height of the cylinder as variables $radius and $height, respectively.
• We have then used the pow() function to calculate the square of the radius ($radius^2).
• We have used the pi() function to retrieve the value of the mathematical constant π in PHP.
• Finally, we have calculated the volume of the cylinder using the formula and printed the result using the echo statement.