PHP program to find the sum of cubes of the first n natural numbers

To find the sum of cubes of the first n natural numbers, the code is as follows −

Example

 Live Demo

<?php
function sum_of_cubes($val)
{
   $init_sum = 0;
   for ($x = 1; $x <= $val; $x++)
      $init_sum += $x * $x * $x;
   return $init_sum;
}
print_r("The sum of cubes of first 8 natural numbers is ");
echo sum_of_cubes(8);
?>

Output

The sum of cubes of first 8 natural numbers is 1296

A function named ‘sum_of_cubes’ is defined that initializes a sum to 0. Every natural number is multiplied by itself thrice (cube) and added to the initial sum. The limit is the value that is passed as a parameter to the function. The limit is defined outside the function and the function is called. Relevant output is displayed on the console.