Question

You will be given a single integer. Your task is to find the sum of its digits.

Examples:

Answer 1

My solution:

<?php

$input = readline();

$number = 0;

for ($i = 0; $i < strlen($input); $i++) {
    $number += $input[$i];
}

echo $number;

Answer 2

Another solution:

<?php

$number = intval(readline());
$sum = 0;

while ($number > 0) {
    $sum += $number % 10;
    $number = intval($number / 10);
}

echo $sum;