Question

How to calculate the LCM (Least Common Multiple) of 3 numbers in PHP

Answer 1

function getLMC($a, $b, $c) {
    $lmc = max($a, $b, $c);
            
    while(true) {
        if ($lmc % $a == 0 && $lmc % $b == 0 && $lmc % $c == 0) {
            return $lmc;
        }
        $lmc++;
    }
}

$a = 12;
$b = 15;
$c = 40;
   
echo "The LCM (Least Common Multiple) is: " . getLMC($a, $b, $c);

  
  
  
    
/*
run:
    
The LCM (Least Common Multiple) is: 120
    
*/

 

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Answer 2

function getLMC($a, $b) {
    $lmc = max($a, $b);
            
    while(true) {
        if ($lmc % $a == 0 && $lmc % $b == 0) {
            return $lmc;
        }
        $lmc++;
    }
}

$a = 12;
$b = 15;
$c = 40;
   
echo "The LCM (Least Common Multiple) is: " . getLMC(getLMC($a, $b), $c);

  
  
  
    
/*
run:
    
The LCM (Least Common Multiple) is: 120
    
*/

 

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