Calculate Combination using Iterative Method in PHP
In this approach, we use iterative method to calculate the combination of given number.
PHP
<?php function combination($n, $r) { if ($n < $r) { return "Invalid input"; } $result = 1; for ($i = 0; $i < $r; $i++) { $result *= ($n - $i); $result /= ($i + 1); } return $result; } // Driver code $n = 5; $r = 2; echo "Combination: " . combination($n, $r); ?> |
Output
Combination: 10
PHP Program to Calculate Combination nCr
This article will show you how to Calculate the Combination nCr in PHP.
Combinations refer to the different ways in which a set of items can be selected without considering the order. In mathematics, the number of combinations of ‘n’ distinct items taken ‘r’ at a time is denoted as nCr. The formula for combinations is nCr = n! / (r! * (n-r)!), where ‘!’ denotes the factorial of a number.