corrade-nucleus-nucleons – Rev 20

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<?php

function nfact($n) {
    if ($n == 0) {
        return 1;
    }
    else {
        return $n * nfact($n - 1);
    }
}

echo "\n\nPlease enter a whole number ... ";
$num = trim(fgets(STDIN));

// ===== PROCESS - Determing the factorial of the input number =====
$output = "\n\nFactorial " . $num . " = " . nfact($num) . "\n\n";
echo $output;

?>
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