Day 9: Recursion 3
https://www.hackerrank.com/challenges/30-recursion/problem
<?php
// Complete the factorial function below.
function factorial($n) {
if($n == 1){
return $n;
} else {
return $n * factorial($n-1);
}
}
$fptr = fopen(getenv("OUTPUT_PATH"), "w");
$stdin = fopen("php://stdin", "r");
fscanf($stdin, "%d\n", $n);
$result = factorial($n);
fwrite($fptr, $result . "\n");
fclose($stdin);
fclose($fptr);