/**
* @dataProvider dataProviderForFactors
*/
public function testFactors(int $x, array $factors)
{
$this->assertEquals($factors, Algebra::factors($x));
}
/**
* Least common multiple
* The smallest positive integer that is divisible by both a and b.
* For example, the LCM of 5 and 2 is 10.
* https://en.wikipedia.org/wiki/Least_common_multiple
*
* |a ⋅ b|
* lcm(a, b) = ---------
* gcd(a, b)
*
* @param int $a
* @param int $b
*
* @return int
*/
public static function lcm(int $a, int $b) : int
{
// Special case
if ($a === 0 || $b === 0) {
return 0;
}
return abs($a * $b) / Algebra::gcd($a, $b);
}
