Area of a Rectangle

Area of a rectangle is calculated by the mathematical formula,

Logic:

Take two variables.
Multiply both of them.

Area of Rectangle in PHP

Program to calculate area of rectangle with length as 14 and width as 12 is shown.

Example:

<?php
 $length = 14;
 $width = 12;
 echo "area of rectangle is $length * $width= " . ($length * $width) . "<br />";
  ?>

Output:

Area of Rectangle with Form in PHP

Program to calculate area of rectangle by inserting values in the form is shown.

Example:

<html>
<body>
<form method = "post"> 
Width: <input type="number" name="width"> 
<br><br> 
Length: <input type="number" name="length"> <br> 
<input type = "submit" name = "submit" value="Calculate"> 
</form> 
</body> 
</html>
<?php 
if(isset($_POST['submit']))
    { 
$width = $_POST['width']; 
$length = $_POST['length']; 
$area = $width*$length; 
echo "The area of a rectangle with $width x $length is $area"; 
} 
?> 

Output: