20 lines
413 B
PHP
20 lines
413 B
PHP
<?php
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// Multifactorial
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for ($degree = 1; $degree <= 5; $degree++) {
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echo 'Degree '.$degree.' => ';
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for ($n = 1; $n <= 10; $n++)
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echo multifactorial($n, $degree).' ';
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echo PHP_EOL;
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}
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function multifactorial (int $n, int $degree): int {
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if ($n < 2)
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return 1;
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else {
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$result = $n;
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for ($i = $n - $degree; $i >= 2; $i -= $degree)
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$result = $result * $i;
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return $result;
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}
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}
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?>
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